Arroyo marine weather forecast
Arroyo (PRARR) is a port in Puerto Rico at 17°58.0′N 66°4.0′W. Today (Sep 17): ESE wind 12–20 kn, waves 1.2–1.6 m, from the ECMWF IFS run 2026-09-17 00z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 17°58.0′N 66°4.0′W |
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| UN/LOCODE | PRARR |
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| Harbor size | Small |
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| Harbor type | Open roadstead |
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| Shelter | Poor |
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| Channel depth | 8 m |
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| Anchorage depth | 6 m |
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| Tide range | 0 m |
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| Pilotage | Compulsory |
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| Time zone | America/Puerto_Rico |
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Facilities & services (NGA World Port Index)| Supplies | Fuel oil, water, provisions |
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| Repairs | Limited |
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| Medical facilities | Available |
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10-day marine forecast — Arroyo
| Date | Wind | Gusts | Waves |
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| ESE 12–20 kn | 26 kn | 1.2–1.6 m |
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| ESE 10–15 kn | 21 kn | 1.1–1.3 m |
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| E 8–9 kn | 14 kn | 0.8–1.0 m |
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| ESE 7–8 kn | 12 kn | 0.7–0.8 m |
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| ESE 7–8 kn | 10 kn | 0.6–0.7 m |
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| ESE 9–9 kn | 12 kn | 0.7–0.7 m |
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| E 6–6 kn | 8 kn | 0.8–0.8 m |
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| E 11–11 kn | 15 kn | 0.9–0.9 m |
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| ESE 10–10 kn | 14 kn | 0.9–0.9 m |
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| ESE 14–14 kn | 18 kn | 1.1–1.1 m |
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Forecast from the ECMWF IFS model run , waves from ECMWF WAM. Updated with each model cycle; the live chart below recalculates for your departure time and vessel.
What to watch in the forecast
Across the loaded 10-day outlook, the strongest daily modeled wind reaches 20 kn on Sep 17. The highest modeled significant wave height is 1.6 m on Sep 17. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Arroyo right now?
As of the ECMWF IFS run 2026-09-17 00z: ESE wind 12–20 kn, waves 1.2–1.6 m. The 10-day outlook is in the forecast table on this page and updates with each model cycle.
How big is the harbor at Arroyo?
Arroyo is classed as a small harbor (open roadstead), with poor shelter in the NGA World Port Index.
How deep is the approach to Arroyo?
Per the NGA World Port Index, the entrance channel carries about 8 m and anchorage depths run about 6 m. Verify against current official charts before entry.