USA · US
Pearl Harbor, HI
Which days in December 2026 would work for a D-Day style landing here? Each day is rated
GO, MARGINAL or NO-GO on the things the 1944 planners needed: calm seas, moonlight for the airborne drop,
low tide at dawn and light winds.
Best day to land
Thursday Dec 24
✓ GO86/100
🌕 100% moon ·
4.6 ft waves
Climate outlook
Next GO day
Sun Dec 20
Score 78 · Climate outlook
Days this month
10 ✓ GO21 ! MARGINAL0 ✕ NO-GO
Tides here
Small
About 1.9 ft a day, so tide timing is left out of the score here.
December 2026
✓ GO! MARGINAL✕ NO-GO
1
OUTLOOK
! MARGINAL 68
🌗 56%
🌊 4ft
2
OUTLOOK
! MARGINAL 60
🌗 46%
🌊 4ft
3
OUTLOOK
! MARGINAL 54
🌘 35%
🌊 5ft
4
OUTLOOK
! MARGINAL 54
🌘 26%
🌊 5ft
5
OUTLOOK
! MARGINAL 54
🌘 17%
🌊 5ft
6
OUTLOOK
! MARGINAL 54
🌘 10%
🌊 5ft
7
OUTLOOK
! MARGINAL 54
🌘 4%
🌊 5ft
8
OUTLOOK
! MARGINAL 53
🌘 1%
🌊 5ft
9
OUTLOOK
! MARGINAL 54
🌑 0%
🌊 5ft
10
OUTLOOK
! MARGINAL 56
🌒 1%
🌊 4ft
11
OUTLOOK
! MARGINAL 57
🌒 4%
🌊 4ft
12
OUTLOOK
! MARGINAL 57
🌒 10%
🌊 4ft
13
OUTLOOK
! MARGINAL 56
🌒 17%
🌊 4ft
14
OUTLOOK
! MARGINAL 56
🌒 26%
🌊 4ft
15
OUTLOOK
! MARGINAL 56
🌒 36%
🌊 4ft
16
OUTLOOK
! MARGINAL 54
🌓 46%
🌊 4ft
17
OUTLOOK
! MARGINAL 58
🌓 57%
🌊 5ft
18
OUTLOOK
! MARGINAL 68
🌔 67%
🌊 5ft
19
OUTLOOK
! MARGINAL 75
🌔 76%
🌊 5ft
20
OUTLOOK
✓ GO 78
🌔 85%
🌊 5ft
21
OUTLOOK
✓ GO 79
🌔 92%
🌊 5ft
22
OUTLOOK
✓ GO 82
🌔 97%
🌊 5ft
23
OUTLOOK
✓ GO 85
🌕 99%
🌊 5ft
24
OUTLOOK
✓ GO 86
🌕 100%
🌊 5ft
25
OUTLOOK
✓ GO 86
🌖 98%
🌊 4ft
26
OUTLOOK
✓ GO 85
🌖 94%
🌊 5ft
27
OUTLOOK
✓ GO 83
🌖 88%
🌊 4ft
28
OUTLOOK
✓ GO 81
🌖 81%
🌊 4ft
29
OUTLOOK
✓ GO 78
🌖 72%
🌊 4ft
30
OUTLOOK
! MARGINAL 73
🌖 62%
🌊 4ft
31
OUTLOOK
! MARGINAL 64
🌗 51%
🌊 4ft
REC recorded weather for past days · FCST live forecast ·
OUTLOOK beyond the forecast: scored against the same week in past years, with this year's real moon and tides.
Select a day for the full breakdown.
Daily score
Dashed lines mark the GO (75) and MARGINAL (50) thresholds. Faded bars are past days.
0
50
75
100
Tue Dec 1: MARGINAL, 68/100 (Climate outlook)
1
Wed Dec 2: MARGINAL, 60/100 (Climate outlook)
Thu Dec 3: MARGINAL, 54/100 (Climate outlook)
Fri Dec 4: MARGINAL, 54/100 (Climate outlook)
Sat Dec 5: MARGINAL, 54/100 (Climate outlook)
5
Sun Dec 6: MARGINAL, 54/100 (Climate outlook)
Mon Dec 7: MARGINAL, 54/100 (Climate outlook)
Tue Dec 8: MARGINAL, 53/100 (Climate outlook)
Wed Dec 9: MARGINAL, 54/100 (Climate outlook)
Thu Dec 10: MARGINAL, 56/100 (Climate outlook)
10
Fri Dec 11: MARGINAL, 57/100 (Climate outlook)
Sat Dec 12: MARGINAL, 57/100 (Climate outlook)
Sun Dec 13: MARGINAL, 56/100 (Climate outlook)
Mon Dec 14: MARGINAL, 56/100 (Climate outlook)
Tue Dec 15: MARGINAL, 56/100 (Climate outlook)
15
Wed Dec 16: MARGINAL, 54/100 (Climate outlook)
Thu Dec 17: MARGINAL, 58/100 (Climate outlook)
Fri Dec 18: MARGINAL, 68/100 (Climate outlook)
Sat Dec 19: MARGINAL, 75/100 (Climate outlook)
Sun Dec 20: GO, 78/100 (Climate outlook)
20
Mon Dec 21: GO, 79/100 (Climate outlook)
Tue Dec 22: GO, 82/100 (Climate outlook)
Wed Dec 23: GO, 85/100 (Climate outlook)
Thu Dec 24: GO, 86/100 (Climate outlook)
Fri Dec 25: GO, 86/100 (Climate outlook)
25
Sat Dec 26: GO, 85/100 (Climate outlook)
Sun Dec 27: GO, 83/100 (Climate outlook)
Mon Dec 28: GO, 81/100 (Climate outlook)
Tue Dec 29: GO, 78/100 (Climate outlook)
Wed Dec 30: MARGINAL, 73/100 (Climate outlook)
30
Thu Dec 31: MARGINAL, 64/100 (Climate outlook)
Best days to land in December 2026
ranked
1
Thu Dec 24Climate outlook · GO in 97% of past years
✓ GO86
🌕 100%
· 4.6 ft
· 13 mph
2
Fri Dec 25Climate outlook · GO in 94% of past years
✓ GO86
🌖 98%
· 4.5 ft
· 13 mph
3
Sat Dec 26Climate outlook · GO in 89% of past years
✓ GO85
🌖 94%
· 4.6 ft
· 12 mph
4
Wed Dec 23Climate outlook · GO in 94% of past years
✓ GO85
🌕 99%
· 4.6 ft
· 13 mph
5
Sun Dec 27Climate outlook · GO in 83% of past years
✓ GO83
🌖 88%
· 4.5 ft
· 13 mph
6
Tue Dec 22Climate outlook · GO in 86% of past years
✓ GO82
🌔 97%
· 4.7 ft
· 13 mph
7
Mon Dec 28Climate outlook · GO in 74% of past years
✓ GO81
🌖 81%
· 4.5 ft
· 12 mph
8
Mon Dec 21Climate outlook · GO in 74% of past years
✓ GO79
🌔 92%
· 4.7 ft
· 15 mph
9
Tue Dec 29Climate outlook · GO in 72% of past years
✓ GO78
🌖 72%
· 4.5 ft
· 12 mph
10
Sun Dec 20Climate outlook · GO in 69% of past years
✓ GO78
🌔 85%
· 4.7 ft
· 13 mph
All sites, December 2026
GO days left and each site's best
Data updated 2026-11-08 11:10 UTC · times shown are local to the site (Pacific/Honolulu).