Crystal River Sea Temperature
Updated Sat 19:19 (America/New_York)
USA · Forecast updated Aug 8, 2026, 19:19 UTC
Current Sea Temperature
30.5°C
86.9°F
Very warm water
Versus this month's average
Close to average
The August average in our archive is 30.5°C (86.9°F).
Recent trend
Cooling by 0.9°C
Seven-day average: 30.4°C, versus 31.3°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.
Sea Surface Temperature Over the Year
In the data collected for Crystal River, monthly averages range from about 30.3°C (86.6°F) in June to 31.8°C (89.2°F) in July.
Over the past 30 days, the average sea temperature in Crystal River has been 31.3°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 28.5°C / 83.3°F | 30.3°C / 86.6°F | 32.3°C / 90.1°F |
| July | 30.6°C / 87.1°F | 31.8°C / 89.2°F | 32.9°C / 91.2°F |
| August | 29.9°C / 85.8°F | 30.5°C / 86.9°F | 31.3°C / 88.3°F |
Profile calculated from 1660 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Crystal River
Spring-fed Gulf coast river where you can snorkel alongside wintering manatees.
- Area
- Florida
Crystal River Water Temperature: Common Questions
What is the sea temperature in Crystal River today?
The current sea surface temperature in Crystal River is 30.5°C. Over the last 30 days, the average has been 31.3°C.
When is the water warmest in Crystal River?
The warmest monthly average in the Crystal River archive is July, at around 31.8°C (89.2°F).
When is the water coldest in Crystal River?
The coldest monthly average in the archive is June, at around 30.3°C (86.6°F).
Can you swim in Crystal River today?
At 30.5°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Crystal River.
View Snorkel Forecast →