Arch Beach Sea Water Temperature
A mild beach on the Gulf of California, warmest around September at about 20.8°C. Today's reading, 7-day forecast, and monthly averages below.
Arch Beach water temperature
Pleasant and revitalizing. Great for most beachgoers and active recreational swimming.
7-Day Water Temperature Forecast
Arch Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Arch Beach occurs inJuly, August, September, October — peaking at20.8°C (69.4°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 | 13.6°C | 14.9°C | 16.5°C | Very Cold (< 16°C) |
| February | 13.4°C | 14.7°C | 17.1°C | Very Cold (< 16°C) |
| March | 13.2°C | 15°C | 17.3°C | Very Cold (< 16°C) |
| April | 13.6°C | 15.7°C | 17.3°C | Very Cold (< 16°C) |
| May | 14.4°C | 17°C | 19.5°C | Cool / Refreshing (16°C – 20°C) |
| June | 15.4°C | 18.3°C | 20.9°C | Cool / Refreshing (16°C – 20°C) |
| July | 17.4°C | 20.2°C | 23.9°C | Comfortable (20°C – 24°C) |
| August | 18.4°C | 20.6°C | 23.1°C | Comfortable (20°C – 24°C) |
| SeptemberCurrent | 17.4°C | 20.8°C | 23.5°C | Comfortable (20°C – 24°C) |
| October | 17.1°C | 19.2°C | 23.3°C | Cool / Refreshing (16°C – 20°C) |
| November | 15.4°C | 17.6°C | 20.1°C | Cool / Refreshing (16°C – 20°C) |
| December | 14.2°C | 15.9°C | 18.8°C | Very Cold (< 16°C) |
Swimming FAQs for Arch Beach
Is the sea warm enough to swim in Arch Beach today?
Typical sea surface temperature in Arch Beach this time of year is 20.8°C (69.4°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 Arch Beach?
The highest water temperatures in Arch Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Arch Beach in September?
Historically in September, water temperatures in Arch Beach average around20.8°C (69.4°F), fluctuating between a recorded minimum of 17.4°C and a maximum of 23.5°C.