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 4.69°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.

40.4

°F

December 21, 09:37

Trend:

decreasing

Yesterday:

40.5°F

Tomorrow:

40.4°F

Sunrise:

08:28

Sunset:

15:13

Day Length:

6 h. 45 min.

Petersburg in December

Minimum:

38.3°F

Average:

40.9°F

Maximum:

42.1°F

Sea water temperature in Petersburg today

As of now, in Petersburg, the water temperature is 40.4°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 1.9°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 44.8°F on 2014, while the historical minimum was 39.2°F on 2022.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 40.0°F, the minimum temperature may reach 39.7°F, and the maximum might stay at 40.4°F.

Daily water temperature in Petersburg

Date	Current Year actual* / forecast**	last year	10 years average
Dec 7	41.9°F	42.6°F	42.6°F
Dec 8	41.8°F	42.6°F	42.7°F
Dec 9	41.9°F	42.6°F	42.8°F
Dec 10	40.5°F	42.7°F	42.6°F
Dec 11	40.7°F	42.2°F	42.6°F
Dec 12	40.9°F	42.3°F	42.6°F
Dec 13	41.1°F	42.4°F	42.7°F
Dec 14	41.2°F	42.5°F	42.7°F
Dec 15	40.6°F	42.5°F	42.5°F
Dec 16	40.4°F	42.7°F	42.5°F
Dec 17	40.4°F	43.3°F	42.5°F
Dec 18	40.1°F	43.2°F	42.4°F
Dec 19	40.3°F	43.2°F	42.4°F
Dec 20	40.5°F	43.0°F	42.2°F
Dec 21	40.4°F	43.0°F	42.3°F
Dec 22	40.4°F	42.9°F	42.2°F
Dec 23	40.2°F	42.6°F	42.1°F
Dec 24	40.1°F	42.4°F	42.0°F
Dec 25	40.0°F	42.3°F	41.9°F
Dec 26	39.8°F	42.2°F	41.6°F
Dec 27	39.8°F	42.1°F	41.6°F
Dec 28	39.7°F	42.0°F	41.6°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 13, 2023, dipping to 37.5°F. The average readings by season are 41.3°F in Winter, 43.1°F in Spring, 53.1°F in Summer, and 46.5°F in Autumn.