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Tomales Bay in February 2027: darkest nights

Night kayak tours from Marshall and Inverness. Fog helps; moonlight hurts. Late summer to early autumn.

16 pitch-dark nights, 17 dark nights

New moon Sat 6 Feb · Full moon Sat 20 Feb

Night by night, February 2027

NightMoon20:0021:30Best
Mon 1 Feb 16%●●●●●●●●●●20:00
Tue 2 Feb 10%●●●●●●●●●●20:00
Wed 3 Feb 5%●●●●●●●●●●20:00
Thu 4 Feb 2%●●●●●●●●●●20:00
Fri 5 Feb 0%●●●●●●●●●●20:00
Sat 6 Feb 0%●●●●●●●●●●20:00
Sun 7 Feb 2%●●●●●●●●●●20:00
Mon 8 Feb 7%●●●●●●●●●●21:30
Tue 9 Feb 13%●●●●●●●●●●21:30
Wed 10 Feb 20%●●●●●●●●●●21:30
Thu 11 Feb 30%●●●●●●●●●●21:30
Fri 12 Feb 40%●●●●●●●●●●21:30
Sat 13 Feb 52%●●●●●●●●●●21:30
Sun 14 Feb 63%●●●●●●●●●●20:00
Mon 15 Feb 74%●●●●●●●●●●20:00
Tue 16 Feb 83%●●●●●●●●●●20:00
Wed 17 Feb 91%●●●●●●●●●●20:00
Thu 18 Feb 97%●●●●●●●●●●20:00
Fri 19 Feb 100%●●●●●●●●●●20:00
Sat 20 Feb 100%●●●●●●●●●●20:00
Sun 21 Feb 97%●●●●●●●●●●20:00
Mon 22 Feb 93%●●●●●●●●●●20:00
Tue 23 Feb 86%●●●●●●●●●●20:00
Wed 24 Feb 78%●●●●●●●●●●20:00
Thu 25 Feb 69%●●●●●●●●●●20:00
Fri 26 Feb 59%●●●●●●●●●●20:00
Sat 27 Feb 50%●●●●●●●●●●20:00
Sun 28 Feb 40%●●●●●●●●●●20:00

Check one night in detail Tomales Bay tours

Questions

What are the best nights to see the bioluminescence at Tomales Bay in February 2027?

The darkest nights are Mon 1 Feb, Tue 2 Feb, Wed 3 Feb, Thu 4 Feb, Fri 5 Feb, Sat 6 Feb, Sun 7 Feb, Mon 8 Feb, Tue 9 Feb, Wed 10 Feb and more. 17 of 28 nights score at least 4 out of 5.

Which nights should I avoid in February 2027?

Avoid the nights around the full moon on Sat 20 Feb, when moonlight washes out the glow.

20:00 or 21:30: which Tomales Bay tour is darker in February?

20:00 is the darker choice on 14 nights; 21:30 is the darker choice on 5 nights.

Tomales Bay darkness by month

Darkness score 1-5 per tour slot from twilight and moonlight. Weather and plankton health are not included. Times are local (America/Los_Angeles).