Grimstad — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Grimstad, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Grimstad today is 13.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 3 | 12.7°C | 16.0°C | |
| JUN 4 | 12.7°C | 16.0°C | |
| JUN 5 | 12.7°C | 16.0°C | |
| JUN 6 | 12.7°C | 16.0°C | |
| JUN 7 | 13.4°C | 16.0°C | |
| JUN 8 | 13.4°C | 16.0°C | |
| JUN 10 | 13.3°C | 16.0°C | |
| JUN 11 | 16.0°C | 13.4°C | |
| JUN 12 | 16.0°C | 13.6°C | |
| JUN 13 | 16.0°C | 13.7°C | |
| JUN 14 | 16.0°C | 13.8°C | |
| JUN 15 | 16.0°C | 14.0°C | |
| JUN 16 | 16.0°C | 14.1°C | |
| JUN 17 | 16.0°C | 14.2°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 3°C | 7°C | 9°C |
| May | 7°C | 11°C | 16°C |
| June | 11°C | 16°C | 20°C |
| July | 13°C | 18°C | 22°C |
| August | 12°C | 17°C | 21°C |
| September | 9°C | 14°C | 18°C |
| October | 5°C | 9°C | 11°C |
| November | 2°C | 6°C | 9°C |
| December | 0°C | 3°C | 6°C |
Grimstad: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Grimstad, in Agder County, has a range of inland lake temperatures that follow the Norwegian seasonal cycle. Typical lake water temperatures in spring sit around 4–12 °C (39–54 °F) as ice melts and the sun warms shallow bays. In summer, July and early August are the warmest months, with many lakes commonly reaching 15–22 °C (59–72 °F) on sunny days; sheltered, shallow spots can be a bit warmer in heatwaves. By autumn the water cools to roughly 8–14 °C (46–57 °F) as air temperatures drop, and in winter lakes hover near freezing, often 0–4 °C (32–39 °F) where ice may form.
Swimming in Grimstad’s lakes is generally allowed and widely practiced, supported by Norway’s public access traditions and many informal bathing spots. Summer months offer the most comfortable conditions for casual swimming, while spring and autumn waters are brisk and require more caution. Water quality is usually good, but local advisories or signage can restrict access near intakes or private properties, and designated beaches are safer because they may have clearer access and emergency information. Winter ice swimming is practiced by some, but it requires experience, safe ice conditions and appropriate precautions.