Puerto Rico · Latin America
Roosevelt Roads, Ceiba
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
✓ GO87/100
🌕 100% moon ·
3.0 ft waves
Climate outlook
Next GO day
Sat Dec 19
Score 76 · Climate outlook
Days this month
12 ✓ GO19 ! MARGINAL0 ✕ NO-GO
Tides here
Small
About 0.9 ft a day, so tide timing is left out of the score here.
December 2026
✓ GO! MARGINAL✕ NO-GO
1
OUTLOOK
! MARGINAL 73
🌗 59%
🌊 3ft
2
OUTLOOK
! MARGINAL 63
🌗 48%
🌊 3ft
3
OUTLOOK
! MARGINAL 58
🌘 38%
🌊 3ft
4
OUTLOOK
! MARGINAL 57
🌘 28%
🌊 3ft
5
OUTLOOK
! MARGINAL 57
🌘 19%
🌊 3ft
6
OUTLOOK
! MARGINAL 57
🌘 11%
🌊 3ft
7
OUTLOOK
! MARGINAL 56
🌘 6%
🌊 3ft
8
OUTLOOK
! MARGINAL 56
🌘 2%
🌊 4ft
9
OUTLOOK
! MARGINAL 56
🌑 0%
🌊 4ft
10
OUTLOOK
! MARGINAL 55
🌑 1%
🌊 4ft
11
OUTLOOK
! MARGINAL 55
🌒 4%
🌊 4ft
12
OUTLOOK
! MARGINAL 54
🌒 8%
🌊 4ft
13
OUTLOOK
! MARGINAL 54
🌒 15%
🌊 4ft
14
OUTLOOK
! MARGINAL 54
🌒 24%
🌊 4ft
15
OUTLOOK
! MARGINAL 53
🌒 33%
🌊 4ft
16
OUTLOOK
! MARGINAL 54
🌓 43%
🌊 4ft
17
OUTLOOK
! MARGINAL 58
🌓 54%
🌊 4ft
18
OUTLOOK
! MARGINAL 65
🌔 64%
🌊 4ft
19
OUTLOOK
✓ GO 76
🌔 74%
🌊 4ft
20
OUTLOOK
✓ GO 79
🌔 83%
🌊 3ft
21
OUTLOOK
✓ GO 82
🌔 90%
🌊 3ft
22
OUTLOOK
✓ GO 84
🌔 96%
🌊 3ft
23
OUTLOOK
✓ GO 85
🌔 99%
🌊 3ft
24
OUTLOOK
✓ GO 87
🌕 100%
🌊 3ft
25
OUTLOOK
✓ GO 86
🌖 99%
🌊 3ft
26
OUTLOOK
✓ GO 86
🌖 96%
🌊 3ft
27
OUTLOOK
✓ GO 84
🌖 90%
🌊 3ft
28
OUTLOOK
✓ GO 83
🌖 83%
🌊 3ft
29
OUTLOOK
✓ GO 80
🌖 74%
🌊 3ft
30
OUTLOOK
✓ GO 77
🌖 64%
🌊 3ft
31
OUTLOOK
! MARGINAL 68
🌗 54%
🌊 3ft
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, 73/100 (Climate outlook)
1
Wed Dec 2: MARGINAL, 63/100 (Climate outlook)
Thu Dec 3: MARGINAL, 58/100 (Climate outlook)
Fri Dec 4: MARGINAL, 57/100 (Climate outlook)
Sat Dec 5: MARGINAL, 57/100 (Climate outlook)
5
Sun Dec 6: MARGINAL, 57/100 (Climate outlook)
Mon Dec 7: MARGINAL, 56/100 (Climate outlook)
Tue Dec 8: MARGINAL, 56/100 (Climate outlook)
Wed Dec 9: MARGINAL, 56/100 (Climate outlook)
Thu Dec 10: MARGINAL, 55/100 (Climate outlook)
10
Fri Dec 11: MARGINAL, 55/100 (Climate outlook)
Sat Dec 12: MARGINAL, 54/100 (Climate outlook)
Sun Dec 13: MARGINAL, 54/100 (Climate outlook)
Mon Dec 14: MARGINAL, 54/100 (Climate outlook)
Tue Dec 15: MARGINAL, 53/100 (Climate outlook)
15
Wed Dec 16: MARGINAL, 54/100 (Climate outlook)
Thu Dec 17: MARGINAL, 58/100 (Climate outlook)
Fri Dec 18: MARGINAL, 65/100 (Climate outlook)
Sat Dec 19: GO, 76/100 (Climate outlook)
Sun Dec 20: GO, 79/100 (Climate outlook)
20
Mon Dec 21: GO, 82/100 (Climate outlook)
Tue Dec 22: GO, 84/100 (Climate outlook)
Wed Dec 23: GO, 85/100 (Climate outlook)
Thu Dec 24: GO, 87/100 (Climate outlook)
Fri Dec 25: GO, 86/100 (Climate outlook)
25
Sat Dec 26: GO, 86/100 (Climate outlook)
Sun Dec 27: GO, 84/100 (Climate outlook)
Mon Dec 28: GO, 83/100 (Climate outlook)
Tue Dec 29: GO, 80/100 (Climate outlook)
Wed Dec 30: GO, 77/100 (Climate outlook)
30
Thu Dec 31: MARGINAL, 68/100 (Climate outlook)
Best days to land in December 2026
ranked
1
Thu Dec 24Climate outlook · GO in 97% of past years
✓ GO87
🌕 100%
· 3.0 ft
· 9 mph
2
Fri Dec 25Climate outlook · GO in 97% of past years
✓ GO86
🌖 99%
· 2.8 ft
· 9 mph
3
Sat Dec 26Climate outlook · GO in 100% of past years
✓ GO86
🌖 96%
· 2.7 ft
· 9 mph
4
Wed Dec 23Climate outlook · GO in 91% of past years
✓ GO85
🌔 99%
· 3.0 ft
· 9 mph
5
Sun Dec 27Climate outlook · GO in 97% of past years
✓ GO84
🌖 90%
· 2.8 ft
· 9 mph
6
Tue Dec 22Climate outlook · GO in 91% of past years
✓ GO84
🌔 96%
· 3.3 ft
· 10 mph
7
Mon Dec 28Climate outlook · GO in 91% of past years
✓ GO83
🌖 83%
· 3.0 ft
· 10 mph
8
Mon Dec 21Climate outlook · GO in 80% of past years
✓ GO82
🌔 90%
· 3.3 ft
· 10 mph
9
Tue Dec 29Climate outlook · GO in 69% of past years
✓ GO80
🌖 74%
· 3.0 ft
· 10 mph
10
Sun Dec 20Climate outlook · GO in 66% of past years
✓ GO79
🌔 83%
· 3.4 ft
· 10 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 (America/Puerto_Rico).