⚓ D-Day Landing Planner

Puerto Rico · Latin America

Roosevelt Roads, Ceiba

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.

Month
November 2026 December 2026 January 2027
Best day to land
Saturday Jan 23
GO 84/100
🌕 100% moon · 3.8 ft waves
Climate outlook
Next GO day
Mon Jan 18
Score 77 · Climate outlook
Days this month
11 GO 20 MARGINAL 0 NO-GO
Tides here
Small
About 0.9 ft a day, so tide timing is left out of the score here.

January 2027

GO 75+ MARGINAL 50–74 NO-GO under 50, or waves ≥ 8 ft / wind ≥ 25 mph
Mon
Tue
Wed
Thu
Fri
Sat
Sun

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, 60/100 (Climate outlook) 1 Sat Jan 2: MARGINAL, 57/100 (Climate outlook) Sun Jan 3: MARGINAL, 56/100 (Climate outlook) Mon Jan 4: MARGINAL, 56/100 (Climate outlook) Tue Jan 5: MARGINAL, 56/100 (Climate outlook) 5 Wed Jan 6: MARGINAL, 56/100 (Climate outlook) Thu Jan 7: MARGINAL, 56/100 (Climate outlook) Fri Jan 8: MARGINAL, 56/100 (Climate outlook) Sat Jan 9: MARGINAL, 56/100 (Climate outlook) Sun Jan 10: MARGINAL, 57/100 (Climate outlook) 10 Mon Jan 11: MARGINAL, 58/100 (Climate outlook) Tue Jan 12: MARGINAL, 57/100 (Climate outlook) Wed Jan 13: MARGINAL, 56/100 (Climate outlook) Thu Jan 14: MARGINAL, 56/100 (Climate outlook) Fri Jan 15: MARGINAL, 56/100 (Climate outlook) 15 Sat Jan 16: MARGINAL, 63/100 (Climate outlook) Sun Jan 17: MARGINAL, 73/100 (Climate outlook) Mon Jan 18: GO, 77/100 (Climate outlook) Tue Jan 19: GO, 79/100 (Climate outlook) Wed Jan 20: GO, 82/100 (Climate outlook) 20 Thu Jan 21: GO, 84/100 (Climate outlook) Fri Jan 22: GO, 84/100 (Climate outlook) Sat Jan 23: GO, 84/100 (Climate outlook) Sun Jan 24: GO, 83/100 (Climate outlook) Mon Jan 25: GO, 82/100 (Climate outlook) 25 Tue Jan 26: GO, 81/100 (Climate outlook) Wed Jan 27: GO, 79/100 (Climate outlook) Thu Jan 28: GO, 76/100 (Climate outlook) Fri Jan 29: MARGINAL, 69/100 (Climate outlook) Sat Jan 30: MARGINAL, 59/100 (Climate outlook) 30 Sun Jan 31: MARGINAL, 54/100 (Climate outlook)

Best days to land in January 2027

ranked

All sites, January 2027

GO days left and each site's best
SiteGOMarg.Best day
Naval Station Guantanamo BayCuba 12 19 Jan 21 GO 88
Pearl Harbor, HIUSA 11 20 Jan 20 GO 87
Roosevelt Roads, CeibaPuerto Rico 11 20 Jan 23 GO 84
Naval Station Norfolk, VAUSA 11 20 Jan 21 GO 84
Camp Pendleton, CAUSA 8 14 Jan 27 GO 86
AnzioItaly 7 15 Jan 24 GO 84
Naval Station RotaSpain 4 20 Jan 22 GO 78
Fort Sherman, ColónPanama 4 15 Jan 22 GO 76
Omaha Beach, NormandyFrance 2 17 Jan 27 GO 77
Utah Beach, NormandyFrance 2 17 Jan 27 GO 76

Data updated 2026-11-08 11:10 UTC · times shown are local to the site (America/Puerto_Rico).