Halden — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Halden, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Halden today is 5.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 41°F (5°C) to 47°F (8°C). This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold. 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 |
|---|---|---|---|
| APR 11 | 4.9°C | 8.0°C | |
| APR 12 | 4.9°C | 8.0°C | |
| APR 13 | 4.9°C | 8.0°C | |
| APR 14 | 5.0°C | 8.0°C | |
| APR 15 | 5.0°C | 8.0°C | |
| APR 16 | 5.2°C | 8.0°C | |
| APR 17 | 5.2°C | 8.0°C | |
| APR 18 | 5.5°C | 8.0°C | |
| APR 19 | 8.0°C | 5.6°C | |
| APR 20 | 8.0°C | 5.8°C | |
| APR 21 | 8.0°C | 5.9°C | |
| APR 22 | 8.0°C | 6.0°C | |
| APR 23 | 8.0°C | 6.1°C | |
| APR 24 | 8.0°C | 6.3°C | |
| APR 25 | 8.0°C | 6.4°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 | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 4°C | 7°C |
| April | 4°C | 8°C | 11°C |
| May | 7°C | 12°C | 17°C |
| June | 13°C | 18°C | 23°C |
| July | 16°C | 21°C | 26°C |
| August | 16°C | 21°C | 26°C |
| September | 12°C | 17°C | 22°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Halden: Weather Forecast
April 19
April 20
April 21
April 22
Location & Local Information
Halden, historically in Østfold county in southeastern Norway, has numerous lakes and rivers that vary seasonally in temperature. In winter many smaller lakes hover around 0–4 °C (32–39 °F) and may ice over during cold spells, while larger or flowing waters can stay close to 0–2 °C (32–36 °F). Spring warming typically brings surface temperatures to roughly 4–12 °C (39–54 °F) as ice melts. During summer the more sheltered lakes commonly reach 15–22 °C (59–72 °F), and on warm, calm weeks temperatures can briefly approach 24–25 °C (75–77 °F). Rivers tend to be cooler and faster, often in the 8–18 °C (46–64 °F) range in summer and noticeably colder in shoulder seasons. Autumn sees a steady decline, with many inland waters falling back toward 6–14 °C (43–57 °F) before freezing resumes.
Swimming in Halden’s lakes and rivers is generally allowed and popular in summer, with several maintained bathing spots and public access under Norway’s outdoor access traditions, but local restrictions or private property signs can apply. Authorities or local municipalities occasionally post water-quality advisories after heavy rain; moreover swimmers should be cautious about cold-water shock, currents, submerged hazards and the frequent absence of lifeguards. For safe swimming, choose established bathing areas, check any local notices, and avoid entering very cold or fast-flowing water without precaution.