INSTRUMENT / SEA TEMPERATURE
Crystal River Water Temperature
Updated Sat 14:57 (America/New_York)
USA · Forecast updated Nov 7, 2026, 14:57 UTC
Current Sea Temperature
24.4°C
75.9°F
Mild water
Valid Nov 7, 2026, 14:57 (America/New_York). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
2.6°C above
The typical November average is 21.8°C (71.2°F) from the historical baseline.
Recent trend
Warming by 0.8°C
Seven-day average: 24.1°C, versus 23.2°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Crystal River, typical monthly averages range from about 14.4°C (57.9°F) in January to 31.5°C (88.7°F) in August.
Over the past 30 days, the average sea temperature in Crystal River has been 25.1°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Crystal River, calculated from hourly observations for 2022–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 13.4–15.2°C | 14.4°C / 57.9°F |
| February | 16.1–18.3°C | 17.2°C / 63.0°F |
| March | 19.2–22.4°C | 21.0°C / 69.8°F |
| April | 23.0–24.7°C | 24.0°C / 75.2°F |
| May | 26.6–28.1°C | 27.5°C / 81.5°F |
| June | 28.8–30.4°C | 29.8°C / 85.6°F |
| July | 30.9–32.0°C | 31.4°C / 88.5°F |
| August | 30.9–32.2°C | 31.5°C / 88.7°F |
| September | 29.0–30.2°C | 29.7°C / 85.5°F |
| October | 25.3–26.1°C | 25.7°C / 78.3°F |
| November | 20.4–23.3°C | 21.8°C / 71.2°F |
| December | 16.2–18.4°C | 17.5°C / 63.5°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (28.88, -82.71). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2022–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Crystal River in January
Typical January water temperature near Crystal River is 14.4°C (57.9°F), with yearly monthly means from 13.4–15.2°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: December 17.5°C · February 17.2°C.
Explore Crystal River sea temperature in January, including swim comfort and month comparisons →
Crystal River in February
Typical February water temperature near Crystal River is 17.2°C (63.0°F), with yearly monthly means from 16.1–18.3°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: January 14.4°C · March 21.0°C.
Explore Crystal River sea temperature in February, including swim comfort and month comparisons →
Crystal River in March
Typical March water temperature near Crystal River is 21.0°C (69.8°F), with yearly monthly means from 19.2–22.4°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: February 17.2°C · April 24.0°C.
Explore Crystal River sea temperature in March, including swim comfort and month comparisons →
Crystal River in April
Typical April water temperature near Crystal River is 24.0°C (75.2°F), with yearly monthly means from 23.0–24.7°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: March 21.0°C · May 27.5°C.
Explore Crystal River sea temperature in April, including swim comfort and month comparisons →
Crystal River in May
Typical May water temperature near Crystal River is 27.5°C (81.5°F), with yearly monthly means from 26.6–28.1°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: April 24.0°C · June 29.8°C.
Explore Crystal River sea temperature in May, including swim comfort and month comparisons →
Crystal River in June
Typical June water temperature near Crystal River is 29.8°C (85.6°F), with yearly monthly means from 28.8–30.4°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: May 27.5°C · July 31.4°C.
Explore Crystal River sea temperature in June, including swim comfort and month comparisons →
Crystal River in July
Typical July water temperature near Crystal River is 31.4°C (88.5°F), with yearly monthly means from 30.9–32.0°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: June 29.8°C · August 31.5°C.
Explore Crystal River sea temperature in July, including swim comfort and month comparisons →
Crystal River in August
Typical August water temperature near Crystal River is 31.5°C (88.7°F), with yearly monthly means from 30.9–32.2°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: July 31.4°C · September 29.7°C.
Explore Crystal River sea temperature in August, including swim comfort and month comparisons →
Crystal River in September
Typical September water temperature near Crystal River is 29.7°C (85.5°F), with yearly monthly means from 29.0–30.2°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: August 31.5°C · October 25.7°C.
Explore Crystal River sea temperature in September, including swim comfort and month comparisons →
Crystal River in October
Typical October water temperature near Crystal River is 25.7°C (78.3°F), with yearly monthly means from 25.3–26.1°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: September 29.7°C · November 21.8°C.
Explore Crystal River sea temperature in October, including swim comfort and month comparisons →
Crystal River in November
Typical November water temperature near Crystal River is 21.8°C (71.2°F), with yearly monthly means from 20.4–23.3°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: October 25.7°C · December 17.5°C.
Explore Crystal River sea temperature in November, including swim comfort and month comparisons →
Crystal River in December
Typical December water temperature near Crystal River is 17.5°C (63.5°F), with yearly monthly means from 16.2–18.4°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: November 21.8°C · January 14.4°C.
Explore Crystal River sea temperature in December, including swim comfort and month comparisons →
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| 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 | 31.2°C / 88.2°F | 32.4°C / 90.3°F |
| September | 27.9°C / 82.2°F | 30.4°C / 86.8°F | 31.7°C / 89.1°F |
| October | 22.8°C / 73.0°F | 26.1°C / 79.0°F | 29.1°C / 84.4°F |
| November | 23.4°C / 74.1°F | 24.2°C / 75.5°F | 24.9°C / 76.8°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3839 hourly forecast records across 6 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 water temperature in Crystal River today?
The current sea surface temperature near Crystal River is 24.4°C (75.9°F). Over the last 30 days, the average has been 25.1°C.
When is the water warmest in Crystal River?
The water is typically warmest in August, at around 31.5°C (88.7°F) in the 2022–2025 historical baseline.
When is the water coldest in Crystal River?
The water is typically coldest in January, at around 14.4°C (57.9°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Crystal River today?
At 24.4°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 →