Can I swim at Fiesta Island right now?

The sea at Fiesta Island is currently 17.9°C — fresh swimming conditions. Most swimmers will find the water comfortable when it's above 22°C; below 18°C feels fresh and a wetsuit is recommended.

What will the sea temperature be at Fiesta Island next week?

Based on long-term July averages and the latest marine model, expect the sea around Fiesta Island to sit close to 21.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.

When is the best month to swim at Fiesta Island?

July – August – September are typically the warmest months to swim at Fiesta Island, with sea temperatures at their seasonal peak.

Do I need a wetsuit at Fiesta Island?

With water currently at 17.9°C: above 22°C no wetsuit needed; 18–22°C a shorty is comfortable for long swims; 14–18°C a 3/2mm full suit; below 14°C a 4/3mm or thicker.

United States

Southern California · Pacific Ocean

Fiesta Island

Mission-Bay dog beach.

Fresh water with a light chop and a moderate breeze — fresh conditions — a wetsuit is recommended.

View on map OpenStreetMap Directions

Sea temperature now

17.9°Cmild

Fair

Updated just now · Source: Open-Meteo Marine

Air temperature

20.5°C

Wave height

1.0 m

Wind

15.6 km/h

UV index

4.0 UV index

Location

Fiesta Island on the map, with nearby beaches and live sea temperatures.

7-day forecast

Water, air, waves, wind and UV outlook for the week ahead.

Wetsuit recommendation

3/2mm fullsuit

At 17.9°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports.

Surf & watersports

Spring/autumn conditions in temperate seas. A 3/2mm full wetsuit (3mm torso, 2mm limbs) is the most versatile thickness — warm enough for 2-hour sessions, flexible enough for paddling. Open-water swimmers should wear a triathlon-cut swim wetsuit.

Open-water swimming

A triathlon-style swim wetsuit keeps you warm for 45–60 minutes.

Recommendation tuned for Fiesta Island's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.

Quick answer

Can I swim at Fiesta Island today?

The sea is currently 17.9°C — fair swimming conditions. Acclimatised swimmers will be most comfortable.

Key takeaways

• Located in Southern California, United States (Pacific Ocean).
• Family friendly with calm, accessible water.
• Live data refreshed hourly from Open-Meteo Marine.

Monthly sea temperature averages

Tap any month to see what to expect — based on regional climatology.

Jan15°C Feb15°C Mar15°C Apr16°C May17°C Jun19°C Jul21°C Aug22°CBest Sep21°C Oct20°C Nov17°C Dec16°C

15°C → 22°C· Current month outlined· “Best” = within 2°C of the annual peak

Year-round sea temperature

Best swim months: Jul – Aug – Sep – Oct

Month	Sea	Comfort
Jan	15°C	Bracing
Feb	15°C	Bracing
Mar	15°C	Bracing
Apr	16°C	Bracing
May	17°C	Bracing
Jun	19°C	Pleasant
Jul	21°C	Pleasant
Aug ⭐	22°C	Warm
Sep	21°C	Pleasant
Oct	20°C	Pleasant
Nov	17°C	Bracing
Dec	16°C	Bracing