Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

For More Weather Information:

Seattle, WA Local Forecast Office

17NM S Seattle WA

Marine Point Forecast

[NOTICE]

Overnight
Light Wind
< 1ft
Thursday
N 9kt
1ft
Thursday Night
N 9kt⇓
< 1ft
Juneteenth
Light Wind
< 1ft
Friday Night
SSW 10kt
< 1ft
Saturday
SW 10kt
1ft
Saturday Night
WSW 10kt⇓
< 1ft
Sunday
Light Wind
< 1ft
Sunday Night
N 8kt⇓
< 1ft

Associated Zone Forecast which includes this point

Last Update: 11:25 pm PDT Jun 17, 2026
Forecast Valid: 12am PDT Jun 18, 2026-6pm PDT Jun 24, 2026

View Nearby Observations

Detailed Forecast

Overnight

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Thursday

N wind 6 to 9 kt. Sunny. Waves around 1 ft.

Thursday Night

N wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Waves 1 ft or less.

Juneteenth

Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

Friday Night

WNW wind 5 to 10 kt becoming SSW after midnight. Mostly clear. Waves 1 ft or less.

Saturday

SW wind 7 to 10 kt. Mostly sunny. Waves around 1 ft.

Saturday Night

WSW wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Clear. Waves 1 ft or less.

Sunday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Sunday Night

N wind 5 to 8 kt becoming variable and less than 5 kt in the evening. Mostly clear. Waves 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.