Seine water levels in October

The current figure for October 2027 on the Seine is 97%: the chance a sailing goes ahead as planned, without high water interfering. In short, low risk. Until the live forecast reaches October, about seven months ahead, this is the thirty-year record.

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.

October begins refilling the Seine's slow, chalky catchment. It takes sustained autumn rain to threaten clearance, so early autumn is usually safe.

Across thirty years of records, October ran as planned on the Seine in about 97% of years, 7th calmest of the twelve months. The calmest months here are July and August; February and March lean hardest on the rain.

The last five Octobers, from the official record: 2026 clear · 2025 clear · 2024 5 high water days · 2023 clear · 2022 clear. Year to year it swings: 2024 met high water in October, and 2026, 2025, 2023 and 2022 stayed 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.