# The Westin South Coast Plaza, Costa Mesa Upcoming Events & Trade Show Calendar (2026–2027)

- **Canonical URL:** https://conventions.com/venues/the-westin-south-coast-plaza-costa-mesa-costa-mesa-ca/events
- **Parent Venue Hub:** https://conventions.com/venues/the-westin-south-coast-plaza-costa-mesa-costa-mesa-ca
- **VenueScore™:** 8.6/10 (Costa Mesa Union Jurisdiction Convention Campus)
- **Address:** Convention & Conference Corridor, Costa Mesa, CA
- **Labor Jurisdiction:** Union Jurisdiction

Audit 2 verified 2026–2027 conventions, trade expositions, and technical congresses hosted at The Westin South Coast Plaza, Costa Mesa (Convention & Conference Corridor, Costa Mesa, CA)—complete with hall assignments, hotel rate compression, and direct links to each show's exhibitor and attendee guide.

## Upcoming Flagship Events & Annual Calendar at The Westin South Coast Plaza, Costa Mesa (2 Mapped Shows)
- **[OCBA Annual Meeting & Installation of Officers 2027](https://conventions.com/events/ocba-annual-meeting-installation)** — Jan 21–21, 2027 | 600+ B2B Attendees | 7.6 / 10 Moderate Corridor Compression
- **[CalCPA Family Law Conference 2026](https://conventions.com/events/calcpa-family-law-conference)** — Oct 22–23, 2026 | 550+ B2B Attendees | 7.6 / 10 Moderate Corridor Compression
- **OCBA Annual Meeting & Installation of Officers** (Finance, FinTech & Banking Trade Association & Conference Committee) — 2027-01-21 – 2027-01-21 | 600+ B2B Attendees | The Westin South Coast Plaza, Costa Mesa Executive Breakout Wing (24 Rooms) (10,000 sq. ft.) | $36–$48/sf (~$7,450 10×10 Est.)
- **CalCPA Family Law Conference** (Finance, FinTech & Banking Trade Association & Conference Committee) — 2026-10-22 – 2026-10-23 | 550+ B2B Attendees | The Westin South Coast Plaza, Costa Mesa Executive Breakout Wing (24 Rooms) (10,000 sq. ft.) | $37–$49/sf (~$7,700 10×10 Est.)

## 12-Month Compression Matrix
- **JAN (Peak):** Q1 Flagship Trade Show Surge
- **FEB (Peak):** High Association & Expo Demand
- **MAR (Peak):** Peak Spring Convention Window
- **APR (Moderate):** Shoulder Openings Late April
- **MAY (Moderate):** Strong Late-May Negotiation Leverage
- **JUN (Value):** Summer Value Rates Begin
- **JUL (Value):** Maximum Room-Block & Space Concessions
- **AUG (Value):** High Availability & Value Pricing
- **SEP (Moderate):** Fall Season Kickoff
- **OCT (Peak):** Peak Q4 Enterprise Congresses
- **NOV (Moderate):** Early Nov Busy; Late Nov Value
- **DEC (Value):** Mid-December Corporate Value Window