CatchWindow fishing intelligence

Boulogne-sur-Mer, France Daily Water Report — October 8, 2026

Boulogne-sur-Mer is a selective rather than easy-water day: sailing and diving rate best, while small-craft boating and kayaking deserve a firm downgrade from the unusually gentle run earlier this week. The culprit is not rain—none is indicated—but a brisk NNW flow around 15 knots, with gusts near 30 knots and an overnight maximum gust of 33.4 knots. Combined seas sit around 1.34 m on a short 4.9-second period, with 1.18 m wind waves at just 4.1 seconds. That is the sort of compact chop that makes a harbor outing feel busier than the headline wave height suggests. The current forecast is also substantial at about 1.17 m/s toward 173 degrees. Treat the 4.6/10 boating and 3.3/10 kayaking scores as a clear signal that this is not a casual-paddle setup, even though conditions should ease toward a 0.62 m wave minimum near 23:00. Sailing leads the practical options at 7.4/10: there is useful wind, but the gust spread and short-period sea demand tidy sail handling and conservative decisions. Diving scores 8/10, supported by the available water-temperature and marine conditions in the model, with SST near 19 C—about 2.3 C above average—but that score is not a promise of underwater visibility. Atmospheric visibility is forecast near 31 km, which is useful above water only. Fishing is middling at 5.9/10. The rising pressure, from roughly 1012 to 1023 hPa through the day, is a modest positive in the score framework, and the late-morning solunar major period from 10:59 to 12:59 is the cleanest daylight timing. A second minor period runs 17:29 to 18:29, close to sunset at 19:19. No tide data are available, so timing cannot be refined around tidal movement. Chlorophyll is high at 4.82 mg/m³, but it should not be read as a wildlife or fish-activity observation. Compared with October 5–7, today is markedly windier: recent reconstructed reports had winds around 2.6–2.8 knots and much stronger boating and kayaking scores. The water has not suddenly become unfriendly; it has simply acquired opinions. Friday looks wetter and potentially rougher, with waves reaching 2.5 m. Saturday remains unsettled, while Sunday improves, and Monday currently offers the quietest marine outlook at 0.4–0.6 m. Best bet: sail only if your crew is comfortable with gusty short chop; otherwise, save the small craft for Monday’s calmer water.