Surf Forecasts:
How big are the waves at Ammonias today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 6ft (1.9m), 8s period with ENE swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 3.5ft (1.0m), 14s period with S swell.
- Evening surf: Evening surf (21 Sep, local time) - 5ft (1.6m), 8s period with ENE swell.
The current surf forecast for Ammonias at 7PM is: 1.6m 8s primary swell from a East-northeast direction and 0.9m 13s secondary swell from a South-southwest direction (forecast issued at 01:00pm September 21). An open ocean swell of 0.2m 11s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 6ft (1.9m) | 8s |
| Afternoon (21 Sep) | 3.5ft (1.0m) | 14s |
| Evening (21 Sep) | 5ft (1.6m) | 8s |
Table - waves today at Ammonias. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Tue night. Warm (max 27°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||||
Mon 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||||||
11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | S 14 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 10 | E 10 | E 9 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 411 | 394 | 324 | 299 | 302 | 310 | 283 | 259 | 273 | 273 | 280 | 280 | 349 | 358 | 452 | 484 | 505 | 527 | 469 | 459 | 440 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross |
High Tide | 1:03PM0.59m | 1:07AM0.30m | 1:35PM0.59m | 1:41AM0.35m | 2:02PM0.59m | ||||||||||||||||
Low Tide | 8:11PM0.17m | 6:19AM0.11m | 8:19PM0.15m | 7:06AM0.10m | 8:31PM0.12m | ||||||||||||||||
 |  | |  | | |  | | | | |  |  | | |  | | | | | | |
 | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — |
 | — | — | 6:34 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:31 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 1 | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 26 | 25 | 25 | 25 | 26 | 27 | 27 | 26 | 25 | 25 |
Feels °C | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 29 | 28 | 28 | 28 | 26 | 27 | 26 | 27 | 27 | 27 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 |
| kJ | 411 | 394 | 304 | 299 | 295 | 232 | 229 | 229 | 215 | 212 | 202 | 146 | 144 | 144 | 144 | 146 | 144 | 106 | 106 | 104 | 106 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 11 | W 11 | W 11 | W 13 | N 13 | NNW 13 | N 12 | N 12 | N 12 | N 11 | N 11 | N 11 | N 10 | N 10 | N 10 | SW 17 | SW 16 | SW 16 | SSW 16 | SSW 16 |
| kJ | 9 | 9 | 9 | 9 | 30 | 31 | 55 | 75 | 103 | 99 | 89 | 86 | 61 | 56 | 52 | 52 | 143 | 132 | 122 | 166 | 164 |
Swell 3 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | N 15 | N 14 | S 16 | W 13 | S 16 | W 12 | SW 19 | SW 19 | SW 17 | SW 17 | SW 17 | SSW 17 | SW 17 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 |
| kJ | 10 | 10 | 9 | 17 | 16 | 19 | 29 | 20 | 25 | 57 | 91 | 72 | 75 | 76 | 119 | 147 | 33 | 32 | 31 | 31 | 31 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 10 | E 10 | E 9 | E 9 |
| kJ | 385 | 355 | 324 | 295 | 302 | 310 | 283 | 259 | 273 | 273 | 280 | 280 | 349 | 358 | 452 | 484 | 505 | 527 | 469 | 459 | 440 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 31 | 31 | 16 | 16 | 16 | 16 | 16 | 31 | 31 | 16 | 16 | 16 | 16 | 16 | 16 | 31 | 31 | 16 | 16 | 16 |
Best forecast wave conditions in Kaua'i | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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