Neiafu (TONEI) — marine weather & port guide
Neiafu is a port in Tonga at 18°39.0′S 173°59.0′W. Today (Aug 3): SSW wind 12–16 kn, waves 1.8–2.0 m, from the ECMWF IFS run 2026-08-03 12z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 18°39.0′S 173°59.0′W |
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| UN/LOCODE | TONEI |
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| Harbor size | Very small |
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| Harbor type | Coastal natural harbor |
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| Shelter | Good |
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| Channel depth | 5 m |
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| Anchorage depth | 23 m |
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| Tide range | 1 m |
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| Pilotage | Compulsory |
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| Time zone | Pacific/Tongatapu |
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10-day marine forecast — Neiafu
| Date | Wind | Gusts | Waves |
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| SSW 12–16 kn | 22 kn | 1.8–2.0 m |
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| S 11–15 kn | 20 kn | 2.2–3.1 m |
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| SSE 10–17 kn | 23 kn | 2.3–2.6 m |
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| SE 19–25 kn | 34 kn | 2.4–4.1 m |
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| SE 23–25 kn | 34 kn | 3.9–4.2 m |
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| ESE 22–24 kn | 30 kn | 3.7–3.7 m |
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| ESE 23–24 kn | 30 kn | 4.1–4.3 m |
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| E 22–22 kn | 30 kn | 3.8–3.8 m |
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| E 20–20 kn | 28 kn | 3.3–3.3 m |
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| ENE 16–16 kn | 24 kn | 2.7–2.7 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.
Frequently asked
How is the weather at Neiafu right now?
As of the ECMWF IFS run 2026-08-03 12z: SSW wind 12–16 kn, waves 1.8–2.0 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 Neiafu?
Neiafu is classed as a very small harbor (coastal natural harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Neiafu?
Per the NGA World Port Index, the entrance channel carries about 5 m and anchorage depths run about 23 m. Verify against current official charts before entry.