Mill Valley flood forecast
Clear today
Next flood window Fri 9:40–11:00 AM
Now
Today 10:54 PM
Tide
4.7 ft
In short
In Mill Valley, roads start to flood when the tide at NOAA's Sausalito station passes about 6.1 ft (MLLW). Next flood: Fri, Oct 23, 9:40–11:00 AM PDT (minor flooding possible), with Sycamore Ave forecast to flood at the peak.
Next 7 days
Flood windows
Fri
Oct 23
9:40–11:00 AMPossiblePeak 6.3 ft · Sycamore Ave
Sat
Oct 24
9:35 AM–12:10 PMPossibleKing tidePeak 6.5 ft · Sycamore Ave
Sun
Oct 25
9:40 AM–1:20 PMLikelyKing tidePeak 6.8 ft · Ryan Ave, Plymouth Ave, Park Ter +5 more
Mon
Oct 26
9:50 AM–2:25 PMSevereKing tidePeak 7.1 ft · Ryan Ave, Plymouth Ave, Park Ter +5 more
Tue
Oct 27
10:15 AM–3:25 PMSevereKing tidePeak 7.2 ft · Ryan Ave, Plymouth Ave, Park Ter +5 more
Wed, Oct
Oct 28
10:45 AM–4:10 PMSevereKing tidePeak 7.2 ft · Ryan Ave, Plymouth Ave, Park Ter +5 more
Tap a day for the street-by-street forecast and a share card. Times are America/Los Angeles time.
Since 1996
Mill Valley flood history
Days with roads at risk
1,517
since 1996
Record high water
8.38 ft
Feb 6, 1998
Days a year, then vs now
40 → 61
1996–05 vs 2016–25
Estimates only. Never drive through flood water — six inches can float a car. Follow local authorities.
How this forecast works
FloodRoute combines NOAA tide predictions for the Sausalito station with the elevation of every road segment in Mill Valley. When the predicted water level rises above a road's lowest point, it's marked — amber for possible, orange for likely, red for severe. The NOAA San Francisco gauge shows how far the water is actually running above or below the tide tables; that difference is carried into the forecast and fades over the following days. Recent rain raises the next 24 hours. After each high tide, streets stay marked a little longer, because water drains off the road more slowly than the tide falls.
Tide source: NOAA station 9414806 (Sausalito). Updated 10:55 PM.
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FAQ
Mill Valley flooding: questions, answered
Which roads flood in Mill Valley?
The worst flood forecast in the next 30 days is Wed, Oct 28, 10:45 AM–4:10 PM PDT (severe flooding likely). At its peak, 8 streets are forecast to flood: Ryan Ave, Plymouth Ave, Park Ter, Oxford Ave, Sycamore Ave, Valley Circle, Surrey Ave and Gomez Way. The live map shows every street, hour by hour.
When is the next flood in Mill Valley?
Fri, Oct 23, 9:40–11:00 AM PDT: minor flooding possible, peaking around 10:24 AM. FloodRoute forecasts 18 more flood windows in the next 30 days. See the street-by-street forecast for that day.
How high does the tide have to be to flood roads in Mill Valley?
Roads start to flood when the tide at NOAA's Sausalito station passes about 6.1 ft (MLLW). Higher tides flood more streets, for longer. FloodRoute marks flooding as possible when the water is less than 0.5 ft above a road's low point, likely up to 1.5 ft, and severe at 1.5 ft or more.
When is the next king tide in Mill Valley?
Sat, Oct 24 at 10:49 AM PDT: a 5.7 ft high tide predicted at NOAA's Sausalito station. FloodRoute calls a high tide a king tide when it is more than 0.7 ft above the station's mean higher high water (MHHW).
How can I get flood alerts for Mill Valley?
The free FloodRoute iPhone app gives you a heads-up before flood windows in your home town; FloodRoute Pro adds street-level alerts for your saved places and your commute. Without the app, subscribe to the Mill Valley flood calendar and flood days appear on your calendar automatically.
How accurate is the Mill Valley flood forecast?
It's an estimate built from NOAA tide predictions for the Sausalito station, corrected with live readings from the NOAA San Francisco gauge, and the measured elevation of every road segment in Mill Valley. Wind, storm surge and blocked drains can change what actually floods. Never drive through flood water.
Marin County