Koksijde Weather in September

Koksijde in September sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 13°C (55°F). Rainfall is fairly high this month at around 75 mm (3 in), so pack a rain jacket to stay dry.

Rainfall in Koksijde in September

Records from the past 30 years suggest around 16 days of rain, with 75 mm (3 in) average for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Koksijde in September

If you're visiting Koksijde in September, expect excellent temperatures with highs of 20°C (68°F) and overnight lows of 13°C (55°F). September is part of summer. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows of 13°C (55°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Koksijde in September

The area experiences a moderate amount of sunshine, with approximately 160 hours of sunlight expected. This means a decent mix of sun and overcast.

Wind Speed in Koksijde in September

September sees wind speeds averaging 6 m/s (12 knots). You'll experience strong winds that cause whole trees to sway and require effort when walking against them. As an average, expect variation from moderate breezes to particularly windy days that affect daily routines.

If your ideal day consists of dry skies and pleasant temperatures, July, August and September typically offer the best circumstances for Koksijde.

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For a detailed overview over the year and the best time to visit Belgium, check out our Koksijde's climate page.

Koksijde Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 54%  

Precipitation 75 mm (3 in)  

Rainy days 16 days  

Humidity 86% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 160 hours *  

Percentage Sunshine *  

* Data from: Ostend, Belgium (18 KM, 11 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Koksijde typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 12°C (54°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Koksijde in September

Browse day-by-day weather records for Koksijde spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Koksijde historical weather extremes in September

The extremes listed below come from historical weather data collected in Koksijde from 1976 through 2025.

• Koksijde recorded its highest September temperature of 33°C (91°F) on September 13, 2016.
• The lowest daytime temperature in September was 11°C (52°F), recorded on September 23, 2012.
• Nighttime temperatures dropped to 2°C (36°F) on September 23, 1979, marking the coldest September night on record.

What to Wear in Koksijde in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Koksijde in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Belgium, check out our Koksijde's climate page.

More climate data for Koksijde

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Koksijde climate overview or explore weather in Belgium.