Grande-Synthe

Grande-Synthe is a town on the Côte d'Opale in Hauts-de-France, France, with a population of 23,213.

Good

Best window 22:00 – 23:00

Good (55) — best around ⁦22:00–23:00⁩, thanks to a major solunar period, moving water, falling pressure.

Shore55
Boat57
Rock25
Kayak12
Spearfishing est.9

Shore55
Boat57
Rock25
Kayak12
Spearfishing9est.

Go — Shore or Boat

Confidence: highUpdated about 10 h ago

ShoreGoBoatGoRockNot todayKayakNot todaySpearfishingNot today

Best ⁦21:00–00:00⁩·Avoid ⁦00:00–18:00⁩

00:0003:0006:0009:0012:0015:0018:0021:00

Why

a major solunar period
moving water
falling pressure
big swell
heavy rain

Tap a block for the reasons

Tides

High tideLow tideHourly fishing scoreMoon overhead or underfootMoonrise or moonsetDawn or dusk lightTide running

Coefficient 49

Heights above approximate chart datum

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Fishing—
Wind— kn
Waves— m

Show all rows

Gusts— kn
Period— s
Current— kn
UV—
Cloud— %
Feels like— °

0h3h6h9h12h15h18h21h

Tap an hour to see the values

Which day to go

Updated about 10 h ago

Day	Shore	Boat	Rock	Kayak	Spearfishing	Wind	Waves	Swell	Water
19 Mon	75	80	27	27	7	4–8kn ESE	0.66–1.26m NNE	0.79m · 5.2s NNE	15.6°
20 Tue	59	65	0	0	0	6–11kn ESE	0.82–1.06m ENE	0.70m · 4.6s NE	15.4°
21 Wed	54	76	0	0	0	8–10kn SSW	0.84–2.16m SW	0.39m · 5.2s SW	15.2°
22 Thu	55	57	25	12	9	4–16kn SSW	0.64–1.86m WSW	0.51m · 6.0s WSW	15.1°
23 Fri	48	26	26	9	9	6–24kn S	0.64–2.60m SSW	0.38m · 5.8s SW	15.2°
24 Sat	0	5	0	0	0	9–23kn WSW	1.18–2.62m W	0.57m · 5.5s NW	14.6°
25 Sun	0	0	0	0	0	12–24kn W	1.58–3.04m W	0.26m · 7.1s WSW	14.6°

Seafloor depth

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Nearby towns include Fort-Mardyck (1.6 km), Saint-Pol-sur-Mer (3.3 km) and Dunkirk (5.8 km). Harbour and port facilities in the area include Bassin de Mardyck (3.4 km), Dunkerque Port Est (4.5 km) and Vieux Port (5.1 km). The Artothèque de Saint-Pol-sur-Mer museum lies 3.2 km away. Tides here are macrotidal and semidiurnal, with a spring range of 5.63 m.

Also known as

Groot-Sinten

Fishing spots nearby

Nearby landmarks

Artothèque de Saint-Pol-sur-Mer — museum, ⁦3.2 km⁩

Questions

Is October 22, 2026 a good day to fish at Grande-Synthe?

Our fishing score for Grande-Synthe on October 22, 2026 is 55 out of 100 — Good.

When is high tide at Grande-Synthe on October 22, 2026?

High tides on October 22, 2026: ⁦10:57 AM, 11:26 PM⁩. Low tides: ⁦05:19 AM, 05:42 PM⁩. Times are local.

What is the tidal range at Grande-Synthe?

The mean spring range at Grande-Synthe is about ⁦5.6 m⁩.

What time do the sun and moon rise at Grande-Synthe?

On October 22, 2026, the sun rises at 08:25 AM and sets at 06:44 PM. The moon rises at 05:11 PM and sets at 03:40 AM.