Long Beach Sea Water Temperature
A cool beach on the Coastal Waters, warmest around September at about 15.7°C. Today's reading, 7-day forecast, and monthly averages below.
Long Beach water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Long Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Long Beach occurs inJuly, August, September, October — peaking at15.7°C (60.3°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 | 2.2°C | 4.4°C | 6.5°C | Very Cold (< 16°C) |
| February | 1.5°C | 2.4°C | 5.7°C | Very Cold (< 16°C) |
| March | -1.2°C | 1.9°C | 3.4°C | Very Cold (< 16°C) |
| April | 0.5°C | 3.4°C | 6°C | Very Cold (< 16°C) |
| May | 3.5°C | 6.2°C | 10.3°C | Very Cold (< 16°C) |
| June | 5.6°C | 10.2°C | 13.5°C | Very Cold (< 16°C) |
| July | 11.1°C | 14.2°C | 17.3°C | Very Cold (< 16°C) |
| August | 12.2°C | 15.4°C | 19.1°C | Very Cold (< 16°C) |
| SeptemberCurrent | 12.8°C | 15.7°C | 19.1°C | Very Cold (< 16°C) |
| October | 11.1°C | 13.9°C | 17.3°C | Very Cold (< 16°C) |
| November | 8°C | 10.4°C | 14°C | Very Cold (< 16°C) |
| December | 4.5°C | 7°C | 8.9°C | Very Cold (< 16°C) |
Swimming FAQs for Long Beach
Is the sea warm enough to swim in Long Beach today?
Typical sea surface temperature in Long Beach this time of year is 15.7°C (60.3°F) — classified as Very Cold (< 16°C). Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges. Live readings load automatically.
What are the warmest months for swimming in Long Beach?
The highest water temperatures in Long Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Long Beach in September?
Historically in September, water temperatures in Long Beach average around15.7°C (60.3°F), fluctuating between a recorded minimum of 12.8°C and a maximum of 19.1°C.