Sullivans Beach Sea Water Temperature
A mild beach on the Gulf of California, warmest around September at about 20.5°C. Today's reading, 7-day forecast, and monthly averages below.
Sullivans Beach water temperature
Pleasant and revitalizing. Great for most beachgoers and active recreational swimming.
7-Day Water Temperature Forecast
Sullivans Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Sullivans Beach occurs inJuly, August, September, October — peaking at20.5°C (68.9°F) in September.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | 13°C | 14.8°C | 16.4°C | Very Cold (< 16°C) |
| February | 12.9°C | 14.7°C | 17.1°C | Very Cold (< 16°C) |
| March | 13°C | 14.9°C | 17.9°C | Very Cold (< 16°C) |
| April | 14°C | 15.7°C | 17.5°C | Very Cold (< 16°C) |
| May | 14.7°C | 16.8°C | 19.3°C | Cool / Refreshing (16°C – 20°C) |
| June | 15.3°C | 18.1°C | 20.1°C | Cool / Refreshing (16°C – 20°C) |
| July | 16.9°C | 19.8°C | 22.1°C | Cool / Refreshing (16°C – 20°C) |
| August | 18.4°C | 20.4°C | 23.1°C | Comfortable (20°C – 24°C) |
| SeptemberCurrent | 18°C | 20.5°C | 24°C | Comfortable (20°C – 24°C) |
| October | 17°C | 19.1°C | 23.7°C | Cool / Refreshing (16°C – 20°C) |
| November | 15.6°C | 17.5°C | 20.4°C | Cool / Refreshing (16°C – 20°C) |
| December | 14.2°C | 15.9°C | 18.7°C | Very Cold (< 16°C) |
Swimming FAQs for Sullivans Beach
Is the sea warm enough to swim in Sullivans Beach today?
Typical sea surface temperature in Sullivans Beach this time of year is 20.5°C (68.9°F) — classified as Comfortable (20°C – 24°C). Pleasant and revitalizing. Great for most beachgoers and active recreational swimming. Live readings load automatically.
What are the warmest months for swimming in Sullivans Beach?
The highest water temperatures in Sullivans Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Sullivans Beach in September?
Historically in September, water temperatures in Sullivans Beach average around20.5°C (68.9°F), fluctuating between a recorded minimum of 18°C and a maximum of 24°C.