The Westin South Coast Plaza, Costa Mesa

Events

Start Planning your meetings or events here

24

Event Rooms

40569 SQ FT

Total Event Space

900

Capacity Largest Space
Executive Boardroom

Meeting and Events

Curate creativity with a meeting or conference in our 40,000 square feet of space in Costa Mesa

Host an inspiring exposition or corporate conference in the Plaza Ballroom, our largest event room
Enjoy post-meeting cocktails under the stars, on our outdoor Waterfall Terrace or Terrace Gazebo
Enhance your meeting in Costa Mesa with help from our expert planners and custom catering services Learn More
Make use of in-room AV equipment and an on-site business center with computer and printer access
Find inspiration for your next gathering by a virtual tour of the Westin South Coast Plaza Learn More

Experience Costa Mesa

Discover a haven of wellness and renewal to feed your journey in Orange County.

Outdoor Heated Pool
Gazebo - Wedding Ceremony

Weddings and Occasions

Our banquet space accommodates everything from intimate bridal parties to grand wedding receptions.

Invite up to 500 guests and dance under glittering chandeliers in the Plaza Ballroom.
Let our beautiful outdoor space offer a romantic venue for your wedding or special event.
Enjoy local cuisine at your wedding reception, courtesy of our culinary team. Learn More
Our hotel offers a special package for Indian weddings; let us honor your unique cultural traditions Learn More
From AV equipment to table arrangements, we'll manage every detail of your special day in Costa Mesa
Private dining room
Rewarding Travel from start to Finish
Earn up to 60,000 points per qualified event with Marriott Bonvoy Events. Elite members earn more with bonus points.

MANAGE YOUR EVENT WITH EASE

Manage event details, make real-time requests and connect with our staff - from the palm of your hand.

Please note: all room sizes are approximate.

Meeting Room Dimensions (LxWxH) Area (sq.ft) Theater Schoolroom Conference U-Shape Reception Banquet
Plaza Ballroom 131x58x12 7598 900 450 126 - 900 650
Balboa 29x58x12 1682 175 108 48 43 175 150
Costa Mesa 54x58x12 3132 300 180 55 50 300 250
Santa Ana 47x58x12 2726 225 160 48 43 225 200
Santa Ana/Costa Mesa 101x58x12 5858 525 340 102 - 525 450
Costa Mesa/Balboa 83x58x12 4814 450 280 108 85 450 370
Viejo 29x19x12 551 50 32 22 20 50 40
Capistrano 29x19x12 551 50 32 22 20 50 40
Laguna 29x19x12 551 50 32 22 20 50 40
Capistrano/Laguna 29x38x12 1102 100 70 44 40 100 80
Laguna/Viejo 29x38x12 1102 100 70 44 40 100 80
East Galleria 158x31x13 4898 - - - - 500 -
Mesa Verde 67x32x11 2144 220 140 50 45 220 160
Segerstrom Room 27x11x9 297 - - 16 - - -
Lido Room 71x37x12 2627 300 160 60 55 300 180
Waterfall Terrace 32x58x- 1856 - - - - 175 120
China Cove 35x18x12 630 70 36 30 25 70 50
Monarch Bay 35x18x12 630 70 36 30 25 70 50
Catalina -x-x- 3074 60 36 - 20 150 60
San Juan/San Marcos 60x21x8 1260 120 70 45 40 120 100
San Juan 30x21x8 630 60 32 24 21 60 40
San Marcos 30x21x8 630 60 32 24 21 60 40
San Pedro/San Diego 60x21x8 1260 120 70 45 40 120 100
San Pedro 30x21x8 630 60 32 24 21 60 40
San Diego 30x21x8 630 60 32 24 21 60 40
San Felipe 30x21x8 630 60 32 24 21 60 40
San Carlos 30x21x8 630 60 32 24 21 60 40
San Gabriel 30x21x8 630 60 32 24 21 60 40
Terrace Pavilion 135x38x20 5130 600 275 - - 600 400
Terrace Gazebo 85x46x- 3910 300 - - - 500 300
Cabana Terrace 55x35x- 1925 180 - - - 175 150
Bolsa Chica 18x13x8 234 20 12 10 - - 20
Crystal Cove 18x13x8 234 20 12 10 - - 20
Del Mar 18x13x8 234 20 12 10 - - 20
Emerald Bay 18x13x8 234 20 12 10 - - 20
Executive Boardroom 28x18x8 504 - - 14 - - -
Plaza Ballroom
Dimensions (LxWxH)
131x58x12
Area (sq.ft)
7598
Theater
900
Schoolroom
450
Conference
126
U-Shape
-
Reception
900
Banquet
650
Balboa
Dimensions (LxWxH)
29x58x12
Area (sq.ft)
1682
Theater
175
Schoolroom
108
Conference
48
U-Shape
43
Reception
175
Banquet
150
Costa Mesa
Dimensions (LxWxH)
54x58x12
Area (sq.ft)
3132
Theater
300
Schoolroom
180
Conference
55
U-Shape
50
Reception
300
Banquet
250
Santa Ana
Dimensions (LxWxH)
47x58x12
Area (sq.ft)
2726
Theater
225
Schoolroom
160
Conference
48
U-Shape
43
Reception
225
Banquet
200
Santa Ana/Costa Mesa
Dimensions (LxWxH)
101x58x12
Area (sq.ft)
5858
Theater
525
Schoolroom
340
Conference
102
U-Shape
-
Reception
525
Banquet
450
Costa Mesa/Balboa
Dimensions (LxWxH)
83x58x12
Area (sq.ft)
4814
Theater
450
Schoolroom
280
Conference
108
U-Shape
85
Reception
450
Banquet
370
Viejo
Dimensions (LxWxH)
29x19x12
Area (sq.ft)
551
Theater
50
Schoolroom
32
Conference
22
U-Shape
20
Reception
50
Banquet
40
Capistrano
Dimensions (LxWxH)
29x19x12
Area (sq.ft)
551
Theater
50
Schoolroom
32
Conference
22
U-Shape
20
Reception
50
Banquet
40
Laguna
Dimensions (LxWxH)
29x19x12
Area (sq.ft)
551
Theater
50
Schoolroom
32
Conference
22
U-Shape
20
Reception
50
Banquet
40
Capistrano/Laguna
Dimensions (LxWxH)
29x38x12
Area (sq.ft)
1102
Theater
100
Schoolroom
70
Conference
44
U-Shape
40
Reception
100
Banquet
80
Laguna/Viejo
Dimensions (LxWxH)
29x38x12
Area (sq.ft)
1102
Theater
100
Schoolroom
70
Conference
44
U-Shape
40
Reception
100
Banquet
80
East Galleria
Dimensions (LxWxH)
158x31x13
Area (sq.ft)
4898
Theater
-
Schoolroom
-
Conference
-
U-Shape
-
Reception
500
Banquet
-
Mesa Verde
Dimensions (LxWxH)
67x32x11
Area (sq.ft)
2144
Theater
220
Schoolroom
140
Conference
50
U-Shape
45
Reception
220
Banquet
160
Segerstrom Room
Dimensions (LxWxH)
27x11x9
Area (sq.ft)
297
Theater
-
Schoolroom
-
Conference
16
U-Shape
-
Reception
-
Banquet
-
Lido Room
Dimensions (LxWxH)
71x37x12
Area (sq.ft)
2627
Theater
300
Schoolroom
160
Conference
60
U-Shape
55
Reception
300
Banquet
180
Waterfall Terrace
Dimensions (LxWxH)
32x58x-
Area (sq.ft)
1856
Theater
-
Schoolroom
-
Conference
-
U-Shape
-
Reception
175
Banquet
120
China Cove
Dimensions (LxWxH)
35x18x12
Area (sq.ft)
630
Theater
70
Schoolroom
36
Conference
30
U-Shape
25
Reception
70
Banquet
50
Monarch Bay
Dimensions (LxWxH)
35x18x12
Area (sq.ft)
630
Theater
70
Schoolroom
36
Conference
30
U-Shape
25
Reception
70
Banquet
50
Catalina
Dimensions (LxWxH)
-x-x-
Area (sq.ft)
3074
Theater
60
Schoolroom
36
Conference
-
U-Shape
20
Reception
150
Banquet
60
San Juan/San Marcos
Dimensions (LxWxH)
60x21x8
Area (sq.ft)
1260
Theater
120
Schoolroom
70
Conference
45
U-Shape
40
Reception
120
Banquet
100
San Juan
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Marcos
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Pedro/San Diego
Dimensions (LxWxH)
60x21x8
Area (sq.ft)
1260
Theater
120
Schoolroom
70
Conference
45
U-Shape
40
Reception
120
Banquet
100
San Pedro
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Diego
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Felipe
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Carlos
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Gabriel
Dimensions (LxWxH)
30x21x8
Area (sq.ft)
630
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
Terrace Pavilion
Dimensions (LxWxH)
135x38x20
Area (sq.ft)
5130
Theater
600
Schoolroom
275
Conference
-
U-Shape
-
Reception
600
Banquet
400
Terrace Gazebo
Dimensions (LxWxH)
85x46x-
Area (sq.ft)
3910
Theater
300
Schoolroom
-
Conference
-
U-Shape
-
Reception
500
Banquet
300
Cabana Terrace
Dimensions (LxWxH)
55x35x-
Area (sq.ft)
1925
Theater
180
Schoolroom
-
Conference
-
U-Shape
-
Reception
175
Banquet
150
Bolsa Chica
Dimensions (LxWxH)
18x13x8
Area (sq.ft)
234
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Crystal Cove
Dimensions (LxWxH)
18x13x8
Area (sq.ft)
234
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Del Mar
Dimensions (LxWxH)
18x13x8
Area (sq.ft)
234
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Emerald Bay
Dimensions (LxWxH)
18x13x8
Area (sq.ft)
234
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Executive Boardroom
Dimensions (LxWxH)
28x18x8
Area (sq.ft)
504
Theater
-
Schoolroom
-
Conference
14
U-Shape
-
Reception
-
Banquet
-
Meeting Room Dimensions (LxWxH) Area (sq.mt) Theater Schoolroom Conference U-Shape Reception Banquet
Plaza Ballroom 39.9x17.7x3.7 705.9 900 450 126 - 900 650
Balboa 8.8x17.7x3.7 156.3 175 108 48 43 175 150
Costa Mesa 16.5x17.7x3.7 291 300 180 55 50 300 250
Santa Ana 14.3x17.7x3.7 253.3 225 160 48 43 225 200
Santa Ana/Costa Mesa 30.8x17.7x3.7 544.2 525 340 102 - 525 450
Costa Mesa/Balboa 25.3x17.7x3.7 447.2 450 280 108 85 450 370
Viejo 8.8x5.8x3.7 51.2 50 32 22 20 50 40
Capistrano 8.8x5.8x3.7 51.2 50 32 22 20 50 40
Laguna 8.8x5.8x3.7 51.2 50 32 22 20 50 40
Capistrano/Laguna 8.8x11.6x3.7 102.4 100 70 44 40 100 80
Laguna/Viejo 8.8x11.6x3.7 102.4 100 70 44 40 100 80
East Galleria 48.2x9.4x4 455 - - - - 500 -
Mesa Verde 20.4x9.8x3.4 199.2 220 140 50 45 220 160
Segerstrom Room 8.2x3.4x2.7 27.6 - - 16 - - -
Lido Room 21.6x11.3x3.7 244.1 300 160 60 55 300 180
Waterfall Terrace 9.8x17.7x- 172.4 - - - - 175 120
China Cove 10.7x5.5x3.7 58.5 70 36 30 25 70 50
Monarch Bay 10.7x5.5x3.7 58.5 70 36 30 25 70 50
Catalina -x-x- 285.6 60 36 - 20 150 60
San Juan/San Marcos 18.3x6.4x2.4 117.1 120 70 45 40 120 100
San Juan 9.1x6.4x2.4 58.5 60 32 24 21 60 40
San Marcos 9.1x6.4x2.4 58.5 60 32 24 21 60 40
San Pedro/San Diego 18.3x6.4x2.4 117.1 120 70 45 40 120 100
San Pedro 9.1x6.4x2.4 58.5 60 32 24 21 60 40
San Diego 9.1x6.4x2.4 58.5 60 32 24 21 60 40
San Felipe 9.1x6.4x2.4 58.5 60 32 24 21 60 40
San Carlos 9.1x6.4x2.4 58.5 60 32 24 21 60 40
San Gabriel 9.1x6.4x2.4 58.5 60 32 24 21 60 40
Terrace Pavilion 41.1x11.6x6.1 476.6 600 275 - - 600 400
Terrace Gazebo 25.9x14x- 363.2 300 - - - 500 300
Cabana Terrace 16.8x10.7x- 178.8 180 - - - 175 150
Bolsa Chica 5.5x4x2.4 21.7 20 12 10 - - 20
Crystal Cove 5.5x4x2.4 21.7 20 12 10 - - 20
Del Mar 5.5x4x2.4 21.7 20 12 10 - - 20
Emerald Bay 5.5x4x2.4 21.7 20 12 10 - - 20
Executive Boardroom 8.5x5.5x2.4 46.8 - - 14 - - -
Plaza Ballroom
Dimensions (LxWxH)
39.9x17.7x3.7
Area (sq.mt)
705.9
Theater
900
Schoolroom
450
Conference
126
U-Shape
-
Reception
900
Banquet
650
Balboa
Dimensions (LxWxH)
8.8x17.7x3.7
Area (sq.mt)
156.3
Theater
175
Schoolroom
108
Conference
48
U-Shape
43
Reception
175
Banquet
150
Costa Mesa
Dimensions (LxWxH)
16.5x17.7x3.7
Area (sq.mt)
291
Theater
300
Schoolroom
180
Conference
55
U-Shape
50
Reception
300
Banquet
250
Santa Ana
Dimensions (LxWxH)
14.3x17.7x3.7
Area (sq.mt)
253.3
Theater
225
Schoolroom
160
Conference
48
U-Shape
43
Reception
225
Banquet
200
Santa Ana/Costa Mesa
Dimensions (LxWxH)
30.8x17.7x3.7
Area (sq.mt)
544.2
Theater
525
Schoolroom
340
Conference
102
U-Shape
-
Reception
525
Banquet
450
Costa Mesa/Balboa
Dimensions (LxWxH)
25.3x17.7x3.7
Area (sq.mt)
447.2
Theater
450
Schoolroom
280
Conference
108
U-Shape
85
Reception
450
Banquet
370
Viejo
Dimensions (LxWxH)
8.8x5.8x3.7
Area (sq.mt)
51.2
Theater
50
Schoolroom
32
Conference
22
U-Shape
20
Reception
50
Banquet
40
Capistrano
Dimensions (LxWxH)
8.8x5.8x3.7
Area (sq.mt)
51.2
Theater
50
Schoolroom
32
Conference
22
U-Shape
20
Reception
50
Banquet
40
Laguna
Dimensions (LxWxH)
8.8x5.8x3.7
Area (sq.mt)
51.2
Theater
50
Schoolroom
32
Conference
22
U-Shape
20
Reception
50
Banquet
40
Capistrano/Laguna
Dimensions (LxWxH)
8.8x11.6x3.7
Area (sq.mt)
102.4
Theater
100
Schoolroom
70
Conference
44
U-Shape
40
Reception
100
Banquet
80
Laguna/Viejo
Dimensions (LxWxH)
8.8x11.6x3.7
Area (sq.mt)
102.4
Theater
100
Schoolroom
70
Conference
44
U-Shape
40
Reception
100
Banquet
80
East Galleria
Dimensions (LxWxH)
48.2x9.4x4
Area (sq.mt)
455
Theater
-
Schoolroom
-
Conference
-
U-Shape
-
Reception
500
Banquet
-
Mesa Verde
Dimensions (LxWxH)
20.4x9.8x3.4
Area (sq.mt)
199.2
Theater
220
Schoolroom
140
Conference
50
U-Shape
45
Reception
220
Banquet
160
Segerstrom Room
Dimensions (LxWxH)
8.2x3.4x2.7
Area (sq.mt)
27.6
Theater
-
Schoolroom
-
Conference
16
U-Shape
-
Reception
-
Banquet
-
Lido Room
Dimensions (LxWxH)
21.6x11.3x3.7
Area (sq.mt)
244.1
Theater
300
Schoolroom
160
Conference
60
U-Shape
55
Reception
300
Banquet
180
Waterfall Terrace
Dimensions (LxWxH)
9.8x17.7x-
Area (sq.mt)
172.4
Theater
-
Schoolroom
-
Conference
-
U-Shape
-
Reception
175
Banquet
120
China Cove
Dimensions (LxWxH)
10.7x5.5x3.7
Area (sq.mt)
58.5
Theater
70
Schoolroom
36
Conference
30
U-Shape
25
Reception
70
Banquet
50
Monarch Bay
Dimensions (LxWxH)
10.7x5.5x3.7
Area (sq.mt)
58.5
Theater
70
Schoolroom
36
Conference
30
U-Shape
25
Reception
70
Banquet
50
Catalina
Dimensions (LxWxH)
-x-x-
Area (sq.mt)
285.6
Theater
60
Schoolroom
36
Conference
-
U-Shape
20
Reception
150
Banquet
60
San Juan/San Marcos
Dimensions (LxWxH)
18.3x6.4x2.4
Area (sq.mt)
117.1
Theater
120
Schoolroom
70
Conference
45
U-Shape
40
Reception
120
Banquet
100
San Juan
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Marcos
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Pedro/San Diego
Dimensions (LxWxH)
18.3x6.4x2.4
Area (sq.mt)
117.1
Theater
120
Schoolroom
70
Conference
45
U-Shape
40
Reception
120
Banquet
100
San Pedro
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Diego
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Felipe
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Carlos
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
San Gabriel
Dimensions (LxWxH)
9.1x6.4x2.4
Area (sq.mt)
58.5
Theater
60
Schoolroom
32
Conference
24
U-Shape
21
Reception
60
Banquet
40
Terrace Pavilion
Dimensions (LxWxH)
41.1x11.6x6.1
Area (sq.mt)
476.6
Theater
600
Schoolroom
275
Conference
-
U-Shape
-
Reception
600
Banquet
400
Terrace Gazebo
Dimensions (LxWxH)
25.9x14x-
Area (sq.mt)
363.2
Theater
300
Schoolroom
-
Conference
-
U-Shape
-
Reception
500
Banquet
300
Cabana Terrace
Dimensions (LxWxH)
16.8x10.7x-
Area (sq.mt)
178.8
Theater
180
Schoolroom
-
Conference
-
U-Shape
-
Reception
175
Banquet
150
Bolsa Chica
Dimensions (LxWxH)
5.5x4x2.4
Area (sq.mt)
21.7
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Crystal Cove
Dimensions (LxWxH)
5.5x4x2.4
Area (sq.mt)
21.7
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Del Mar
Dimensions (LxWxH)
5.5x4x2.4
Area (sq.mt)
21.7
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Emerald Bay
Dimensions (LxWxH)
5.5x4x2.4
Area (sq.mt)
21.7
Theater
20
Schoolroom
12
Conference
10
U-Shape
-
Reception
-
Banquet
20
Executive Boardroom
Dimensions (LxWxH)
8.5x5.5x2.4
Area (sq.mt)
46.8
Theater
-
Schoolroom
-
Conference
14
U-Shape
-
Reception
-
Banquet
-
Banquet
Generally used for meals and sessions involving small group discussions. A five foot round table seats eight people comfortably. A six foot round table seats 10 people comfortably.
Conference and Hollow Square
Appropriate for interactive discussions and note-taking sessions for fewer than 25 people. Many hotels have elegant "boardrooms" for 10 to 20 people, equipped with full audiovisual capabilities, a writing board, cork board and a flip chart.
E-Shape, U-Shape and T-Shape
Appropriate for groups of fewer than 40 people. These are best for interaction with a leader seated at the head of the setup. Audiovisual is usually best set up at the open end of the seating.
Theater
Appropriate for large sessions and short lectures that do not require extensive note-taking. This is a convenient setup to use before breaking into discussion or role-playing groups because chairs can be moved.
Reception
Stand-up social function where beverages and light foods are served. Foods may be presented on small buffet tables or passed by servers. May precede a meal function.
Schoolroom or Classroom
The most desirable setup for medium to large-size lectures. Requires a relatively large room. Tables provide attendees with space for spreading out materials and taking notes.
Ovals and Rounds
Generally used for meals and sessions involving small group discussions. A five foot round table seats eight people comfortably. A six foot round table seats 10 people comfortably.
Audio-Visual Equipment
  • PA System
Event Equipment & Supplies
  • Blackboards
  • Installed Stage
  • Lobby Bulletin Board
  • Podium Lectern
  • Polling Devices
  • Portable Stage
  • Spotlights
  • Stack Chairs
  • Tables
Business Services
  • Computers
  • Fax Service
  • Overnight Delivery/Pickup
  • Post/Parcel
  • Printers