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 7.74°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.

45.9

°F

May 26, 10:58

Trend:

increasing

Yesterday:

45.6°F

Tomorrow:

46.2°F

Sunrise:

04:16

Sunset:

21:23

Day Length:

17 h. 7 min.

Petersburg in June

Minimum:

39.5°F

Average:

41.3°F

Maximum:

43.2°F

Sea water temperature in Petersburg today

As of now, in Petersburg, the water temperature is 45.9°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 2.0°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 50.2°F on 2016, while the historical minimum was 46.2°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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 46.9°F, with minimum temperature starting at 46.2°F, while the maximum might reach 47.6°F.

Daily water temperature in Petersburg

Date	Current Year actual* / forecast**	last year	10 years average
May 12	44.0°F	45.6°F	46.1°F
May 13	44.1°F	44.5°F	46.1°F
May 14	45.1°F	44.5°F	46.4°F
May 15	44.8°F	44.4°F	46.4°F
May 16	44.9°F	44.6°F	46.6°F
May 17	45.2°F	44.7°F	46.6°F
May 18	46.1°F	44.8°F	47.0°F
May 19	46.1°F	45.0°F	46.9°F
May 20	45.9°F	45.4°F	47.1°F
May 21	46.0°F	45.9°F	47.3°F
May 22	46.1°F	46.2°F	47.4°F
May 23	45.3°F	46.3°F	47.6°F
May 24	45.4°F	46.4°F	47.5°F
May 25	45.6°F	46.5°F	47.6°F
May 26	45.9°F	46.7°F	47.9°F
May 27	46.2°F	46.9°F	48.2°F
May 28	46.3°F	47.1°F	48.4°F
May 29	46.7°F	47.3°F	48.7°F
May 30	47.1°F	47.4°F	49.1°F
May 31	47.2°F	47.5°F	49.2°F
Jun 1	47.4°F	47.6°F	49.4°F
Jun 2	47.6°F	47.7°F	49.6°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, 53.0°F in Summer, and 46.3°F in Autumn.