CatchWindow fishing intelligence

Boulogne-sur-Mer, France Daily Water Report — October 5, 2026

Boulogne’s harbor gets a clear green light for small-craft time today, with kayaking (8.6/10), diving (8.8/10) and boating (8.4/10) all benefiting from unusually slight water. Waves hold around 0.2–0.3 m, with the day’s calmest patch near 10:00 at 0.22 m; the modest 0.24 m west-southwest swell is more background texture than a working sea. Light SSE wind, generally 1.8–6.9 knots, keeps the surface civilized, though gusts may reach 15.2 knots around 17:00. The best all-round window is from dawn through late morning. It overlaps the 08:29–10:29 solunar major period and the lowest wave heights, while the air warms from a cool, damp start toward an 18.5 C afternoon. For anglers, the fishing outlook is fair rather than electric at 6.2/10: the morning major period is the cleaner bet, with a second major period from 20:29–22:29 after sunset. Pressure is high but falling, from a 1027.7 hPa high toward roughly 1023 hPa, so conditions are changing gently rather than locking into a static pattern. Do not mistake the flat water for perfect visibility. Current atmospheric visibility is only 0.4 km under 93% cloud and saturated air, and that is a navigation issue in its own right; it says nothing about underwater visibility. Divers have a strong score, supported by low wind and waves plus 18.3 C sea-surface temperature, but should treat the 0.31 m/s current toward 342° as real water movement, not decorative data. No tide information is available, so harbor timing and local current effects need checking independently. Sailing is merely middling at 5.2/10: pleasant for drifting about, less convincing for anyone hoping the sails will earn their keep. Compared with yesterday, boating eases from 9.2 while diving improves from 7.6; kayaking is essentially steady. Tomorrow looks even smoother, with 0.1–0.2 m waves and light winds. From Wednesday onward, stronger winds, rain chances and building seas make today and Tuesday the tidy window before the weather gets ideas. Best bet: launch early, use the glassy 08:29–10:29 window wisely, and keep a sharp eye out in the murk.