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Costa Mesa, CA Marine Weather Forecast

Tonight - 61°F
May 16, 2026
10 to 15 mph SE
Partly Cloudy
Partly cloudy, with a low around 61. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday - 69°F
May 17, 2026
10 to 15 mph S
Mostly Sunny
Mostly sunny, with a high near 69. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night - 61°F
May 17, 2026
5 to 15 mph S
Partly Cloudy
Partly cloudy, with a low around 61. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday - 69°F
May 18, 2026
5 to 15 mph S
Mostly Sunny
Mostly sunny, with a high near 69. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night - 59°F
May 18, 2026
5 to 10 mph S
Mostly Clear
Mostly clear, with a low around 59. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday - 71°F
May 19, 2026
5 to 10 mph SW
Sunny
Sunny, with a high near 71.
Tuesday Night - 60°F
May 19, 2026
0 to 10 mph S
Mostly Clear
Mostly clear, with a low around 60.
Wednesday - 72°F
May 20, 2026
0 to 10 mph S
Sunny
Sunny, with a high near 72.
Wednesday Night - 60°F
May 20, 2026
5 to 10 mph S
Mostly Clear
Mostly clear, with a low around 60.
Thursday - 71°F
May 21, 2026
5 to 10 mph S
Sunny
Sunny, with a high near 71.
Thursday Night - 60°F
May 21, 2026
5 to 10 mph S
Partly Cloudy
Partly cloudy, with a low around 60.
Friday - 70°F
May 22, 2026
5 to 10 mph S
Mostly Sunny
Mostly sunny, with a high near 70.
Friday Night - 59°F
May 22, 2026
0 to 10 mph S
Partly Cloudy
Partly cloudy, with a low around 59.
Saturday - 70°F
May 23, 2026
0 to 10 mph SW
Mostly Sunny
Mostly sunny, with a high near 70.

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