USA · US
Pearl Harbor, HI
Which days in January 2027 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
Wednesday Jan 20
✓ GO87/100
🌔 94% moon ·
5.1 ft waves
Climate outlook
Next GO day
Sun Jan 17
Score 81 · Climate outlook
Days this month
11 ✓ GO20 ! MARGINAL0 ✕ NO-GO
Tides here
Small
About 1.9 ft a day, so tide timing is left out of the score here.
January 2027
✓ GO! MARGINAL✕ NO-GO
1
OUTLOOK
! MARGINAL 57
🌗 41%
🌊 4ft
2
OUTLOOK
! MARGINAL 56
🌘 31%
🌊 4ft
3
OUTLOOK
! MARGINAL 56
🌘 21%
🌊 4ft
4
OUTLOOK
! MARGINAL 57
🌘 13%
🌊 4ft
5
OUTLOOK
! MARGINAL 56
🌘 7%
🌊 5ft
6
OUTLOOK
! MARGINAL 55
🌘 3%
🌊 5ft
7
OUTLOOK
! MARGINAL 56
🌑 0%
🌊 5ft
8
OUTLOOK
! MARGINAL 56
🌑 0%
🌊 5ft
9
OUTLOOK
! MARGINAL 57
🌒 2%
🌊 5ft
10
OUTLOOK
! MARGINAL 57
🌒 7%
🌊 5ft
11
OUTLOOK
! MARGINAL 57
🌒 13%
🌊 5ft
12
OUTLOOK
! MARGINAL 58
🌒 21%
🌊 5ft
13
OUTLOOK
! MARGINAL 59
🌒 30%
🌊 5ft
14
OUTLOOK
! MARGINAL 59
🌒 40%
🌊 5ft
15
OUTLOOK
! MARGINAL 63
🌓 51%
🌊 5ft
16
OUTLOOK
! MARGINAL 72
🌔 62%
🌊 5ft
17
OUTLOOK
✓ GO 81
🌔 72%
🌊 5ft
18
OUTLOOK
✓ GO 83
🌔 81%
🌊 5ft
19
OUTLOOK
✓ GO 85
🌔 88%
🌊 5ft
20
OUTLOOK
✓ GO 87
🌔 94%
🌊 5ft
21
OUTLOOK
✓ GO 87
🌔 98%
🌊 5ft
22
OUTLOOK
✓ GO 87
🌕 100%
🌊 5ft
23
OUTLOOK
✓ GO 86
🌕 99%
🌊 5ft
24
OUTLOOK
✓ GO 85
🌖 97%
🌊 5ft
25
OUTLOOK
✓ GO 83
🌖 92%
🌊 4ft
26
OUTLOOK
✓ GO 80
🌖 85%
🌊 4ft
27
OUTLOOK
✓ GO 76
🌖 77%
🌊 4ft
28
OUTLOOK
! MARGINAL 73
🌖 67%
🌊 5ft
29
OUTLOOK
! MARGINAL 63
🌗 57%
🌊 5ft
30
OUTLOOK
! MARGINAL 55
🌗 46%
🌊 5ft
31
OUTLOOK
! MARGINAL 53
🌘 36%
🌊 5ft
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
Fri Jan 1: MARGINAL, 57/100 (Climate outlook)
1
Sat Jan 2: MARGINAL, 56/100 (Climate outlook)
Sun Jan 3: MARGINAL, 56/100 (Climate outlook)
Mon Jan 4: MARGINAL, 57/100 (Climate outlook)
Tue Jan 5: MARGINAL, 56/100 (Climate outlook)
5
Wed Jan 6: MARGINAL, 55/100 (Climate outlook)
Thu Jan 7: MARGINAL, 56/100 (Climate outlook)
Fri Jan 8: MARGINAL, 56/100 (Climate outlook)
Sat Jan 9: MARGINAL, 57/100 (Climate outlook)
Sun Jan 10: MARGINAL, 57/100 (Climate outlook)
10
Mon Jan 11: MARGINAL, 57/100 (Climate outlook)
Tue Jan 12: MARGINAL, 58/100 (Climate outlook)
Wed Jan 13: MARGINAL, 59/100 (Climate outlook)
Thu Jan 14: MARGINAL, 59/100 (Climate outlook)
Fri Jan 15: MARGINAL, 63/100 (Climate outlook)
15
Sat Jan 16: MARGINAL, 72/100 (Climate outlook)
Sun Jan 17: GO, 81/100 (Climate outlook)
Mon Jan 18: GO, 83/100 (Climate outlook)
Tue Jan 19: GO, 85/100 (Climate outlook)
Wed Jan 20: GO, 87/100 (Climate outlook)
20
Thu Jan 21: GO, 87/100 (Climate outlook)
Fri Jan 22: GO, 87/100 (Climate outlook)
Sat Jan 23: GO, 86/100 (Climate outlook)
Sun Jan 24: GO, 85/100 (Climate outlook)
Mon Jan 25: GO, 83/100 (Climate outlook)
25
Tue Jan 26: GO, 80/100 (Climate outlook)
Wed Jan 27: GO, 76/100 (Climate outlook)
Thu Jan 28: MARGINAL, 73/100 (Climate outlook)
Fri Jan 29: MARGINAL, 63/100 (Climate outlook)
Sat Jan 30: MARGINAL, 55/100 (Climate outlook)
30
Sun Jan 31: MARGINAL, 53/100 (Climate outlook)
Best days to land in January 2027
ranked
1
Wed Jan 20Climate outlook · GO in 94% of past years
✓ GO87
🌔 94%
· 5.1 ft
· 9 mph
2
Thu Jan 21Climate outlook · GO in 94% of past years
✓ GO87
🌔 98%
· 4.8 ft
· 10 mph
3
Fri Jan 22Climate outlook · GO in 94% of past years
✓ GO87
🌕 100%
· 4.8 ft
· 10 mph
4
Sat Jan 23Climate outlook · GO in 94% of past years
✓ GO86
🌕 99%
· 4.8 ft
· 10 mph
5
Tue Jan 19Climate outlook · GO in 91% of past years
✓ GO85
🌔 88%
· 4.8 ft
· 9 mph
6
Sun Jan 24Climate outlook · GO in 94% of past years
✓ GO85
🌖 97%
· 4.7 ft
· 11 mph
7
Mon Jan 18Climate outlook · GO in 91% of past years
✓ GO83
🌔 81%
· 4.8 ft
· 9 mph
8
Mon Jan 25Climate outlook · GO in 89% of past years
✓ GO83
🌖 92%
· 4.5 ft
· 11 mph
9
Sun Jan 17Climate outlook · GO in 89% of past years
✓ GO81
🌔 72%
· 4.7 ft
· 9 mph
10
Tue Jan 26Climate outlook · GO in 77% of past years
✓ GO80
🌖 85%
· 4.4 ft
· 11 mph
All sites, January 2027
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).