Haarlem — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Haarlem, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Haarlem today is 20°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 23 | 18.0°C | 19.5°C | |
| JUN 24 | 18.5°C | 19.5°C | |
| JUN 25 | 18.5°C | 19.5°C | |
| JUN 26 | 19.2°C | 19.5°C | |
| JUN 27 | 19.5°C | 19.5°C | |
| JUN 28 | 19.6°C | 19.5°C | |
| JUN 29 | 19.6°C | 19.5°C | |
| JUN 30 | 19.6°C | 19.5°C | |
| JUL 1 | 21.3°C | 20.1°C | |
| JUL 2 | 21.3°C | 20.1°C | |
| JUL 3 | 21.3°C | 20.2°C | |
| JUL 4 | 21.3°C | 20.3°C | |
| JUL 5 | 21.3°C | 20.3°C | |
| JUL 6 | 21.3°C | 20.4°C | |
| JUL 7 | 21.3°C | 20.5°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 | 3°C | 5°C | 7°C |
| February | 1°C | 4°C | 7°C |
| March | 5°C | 9°C | 11°C |
| April | 8°C | 12°C | 15°C |
| May | 11°C | 15°C | 18°C |
| June | 15°C | 20°C | 23°C |
| July | 18°C | 21°C | 26°C |
| August | 16°C | 20°C | 24°C |
| September | 14°C | 17°C | 22°C |
| October | 8°C | 12°C | 16°C |
| November | 3°C | 8°C | 12°C |
| December | 3°C | 5°C | 7°C |
Haarlem: Weather Forecast
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Location & Local Information
Haarlem, located along the Spaarne River, offers an attractive setting for water-based activities, although swimming in the river itself is not common. The water temperature in the Spaarne River typically ranges from 10-15°C (50-59°F) during the colder months, rising to 15-20°C (59-68°F) in the summer months, which may make swimming uncomfortable for some. The Spaarne is used more for boating, kayaking, and other water sports than for recreational swimming. Additionally, the quality of the water can vary, especially as the river is part of a larger water system, and high boat traffic can affect water clarity and cleanliness. Local authorities and swimming organizations generally do not recommend swimming in the Spaarne without proper precautions.
There are, however, designated swimming areas nearby, such as those found in recreational lakes or pools around Haarlem, where the water quality is better monitored. The city’s proximity to the North Sea also makes it easy for residents and visitors to access the beach in Zandvoort, just a short drive away, where swimming is much more popular and safe due to regular water quality checks and lifeguard services. For those looking to swim in more natural settings, other inland lakes may offer more comfortable conditions.