Seine water levels in September

For September 2027 the Seine shows a 100% chance a cruise runs as planned: low risk. It reflects the thirty-year record for September; the live forecast reaches this month about seven months out.

On the Seine the risk runs the other way: high water. Too little clearance under the Paris bridges pauses sailings and closes moorings. The river never dries out. It rises.

September stays quiet as the Seine's catchment sits dry from summer. The flood season is still months away.

September has gone without high water in roughly 100% of the past thirty years on this river, 3th calmest of the twelve months. July and August run calmest on the Seine; February and March reward flexible plans.

The last five Septembers, from the official record: 2026 clear · 2025 clear · 2024 clear · 2023 clear · 2022 clear. All five recent Septembers came through clear.

For your own dates, the cruise checker scores the exact window day by day. The Seine page carries the live gauges, and when to go compares all four rivers.