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 9.75°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.

49.6

°F

June 15, 14:19

Trend:

stable

Yesterday:

51.7°F

Tomorrow:

50.2°F

Sunrise:

03:58

Sunset:

21:46

Day Length:

17 h. 48 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 49.6°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 0.6°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 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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 52.3°F on 2022, while the historical minimum was 48.1°F on 2024.

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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 50.7°F, with minimum temperature starting at 50.2°F, while the maximum might reach 51.2°F.

Daily water temperature in Petersburg

Date	Current Year actual* / forecast**	last year	10 years average
Jun 1	46.6°F	47.6°F	49.1°F
Jun 2	47.1°F	47.7°F	49.6°F
Jun 3	48.1°F	47.8°F	49.5°F
Jun 4	48.6°F	46.0°F	49.4°F
Jun 5	48.6°F	47.5°F	49.4°F
Jun 6	48.5°F	47.7°F	49.6°F
Jun 7	48.2°F	47.3°F	49.1°F
Jun 8	48.5°F	47.6°F	49.0°F
Jun 9	48.8°F	47.7°F	49.4°F
Jun 10	48.8°F	47.5°F	49.4°F
Jun 11	50.8°F	48.0°F	49.7°F
Jun 12	51.2°F	48.0°F	49.9°F
Jun 13	50.1°F	46.2°F	49.8°F
Jun 14	51.7°F	49.1°F	50.2°F
Jun 15	49.6°F	48.2°F	50.1°F
Jun 16	50.2°F	50.2°F	50.8°F
Jun 17	50.6°F	50.2°F	51.2°F
Jun 18	50.5°F	49.7°F	51.0°F
Jun 19	50.7°F	49.2°F	51.3°F
Jun 20	50.6°F	47.8°F	51.2°F
Jun 21	51.0°F	48.1°F	51.5°F
Jun 22	51.2°F	49.0°F	51.8°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.