What is the current water temperature in Petersburg?

Q: What is the current water temperature in Petersburg?

As of now, in Petersburg, the water temperature is 6.5°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United States > Petersburg

Water temperature in Petersburg

Detailed information about the current water temperature in Petersburg. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

43.7

°F

October 24, 20:52

Trend:

stable

Yesterday:

43.6°F

Tomorrow:

43.6°F

Sunrise:

07:44

Sunset:

17:27

Day Length:

9 h. 43 min.

Petersburg in November

Minimum:

38.0°F

Average:

40.6°F

Maximum:

41.9°F

Sea water temperature in Petersburg today

As of now, in Petersburg, the water temperature is 43.7°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.3°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 46.1°F on 2022, while the historical minimum was 42.7°F on 2024.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 43.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Petersburg

Date	Current Year actual* / forecast**	last year	10 years average
Oct 10	45.1°F	45.1°F	45.8°F
Oct 11	43.9°F	45.7°F	45.6°F
Oct 12	44.0°F	44.1°F	45.4°F
Oct 13	44.0°F	43.7°F	45.4°F
Oct 14	45.1°F	44.5°F	45.6°F
Oct 15	44.5°F	45.6°F	45.7°F
Oct 16	44.9°F	45.1°F	45.6°F
Oct 17	44.9°F	45.6°F	45.6°F
Oct 18	44.7°F	45.6°F	45.7°F
Oct 19	44.4°F	45.6°F	45.5°F
Oct 20	44.2°F	44.6°F	45.5°F
Oct 21	44.2°F	44.7°F	45.3°F
Oct 22	43.8°F	44.8°F	45.0°F
Oct 23	43.6°F	44.8°F	44.9°F
Oct 24	43.7°F	45.6°F	45.0°F
Oct 25	43.6°F	45.7°F	44.9°F
Oct 26	43.5°F	45.1°F	44.8°F
Oct 27	43.4°F	45.1°F	44.7°F
Oct 28	43.4°F	44.8°F	44.7°F
Oct 29	43.3°F	44.5°F	44.5°F
Oct 30	43.3°F	44.5°F	44.6°F
Oct 31	43.2°F	44.5°F	44.5°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Petersburg by month

In an average year, Petersburg offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Petersburg was recorded on July 7, 2019, reaching a 60.2°F. While the coldest temperature occurred on January 24, 2026, dipping to 36.5°F. The average readings by season are 40.9°F in Winter, 42.9°F in Spring, 52.9°F in Summer, and 46.3°F in Autumn.