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Boulogne-sur-Mer, France Daily Water Report — August 26, 2026

Today in Boulogne-sur-Mer, diving enthusiasts should be thrilled with an impressive 8.8 out of 10 suitability score, thanks to calm wave conditions and inviting water temperatures. The sea surface temperature is a warm 20.8°C, a noticeable 2.5°C above average, which should make your underwater explorations quite pleasant. Visibility is decent at nearly 17 kilometers, though this pertains to atmospheric conditions, not underwater clarity. Boaters will find the day fairly accommodating with a score of 7 out of 10. The gentle southeast winds, peaking at 9.2 knots, should provide a comfortable ride, though keep an eye out for gusts up to 17.1 knots later tonight. The ocean is relatively calm, with wave heights not exceeding 0.3 meters, offering a stable experience for most small crafts. Fishing scores a moderate 6.1 out of 10, with the solunar major periods offering the best windows from 10:03 to 12:03 and 22:03 to 24:03. The waxing gibbous moon, nearly full, might add a touch of magic to your evening catch attempts. Kayakers and wildlife watchers share a 6.5 out of 10 score, enjoying the mild weather and light winds. Kayakers can expect the calmest waters around 20:00, with wave heights dipping to 0.22 meters. As for surfers, today might be a bit of a letdown with a 4.6 out of 10 score due to the small wave size and short periods—a stark contrast to the more robust conditions predicted later this week. Looking ahead, expect increasing winds and rain toward the weekend, with waves building significantly by Sunday. For a memorable outing, consider diving today to take full advantage of the optimal conditions.