Surf Forecasts:
How big are the waves at Waimanalo today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 6ft (1.9m), 8s period with ENE swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 6.5ft (2.0m), 7s period with E swell.
- Evening surf: Evening surf (20 Sep, local time) - 7ft (2.1m), 7s period with ENE swell.
The current surf forecast for Waimanalo at 12AM is: 2.2m 8s primary swell from a East direction (forecast issued at 07:00pm September 19). An open ocean swell of 0.4m 16s is not directed at the surf break, a second open ocean swell of 0.1m 13s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 6ft (1.9m) | 8s |
| Afternoon (20 Sep) | 6.5ft (2.0m) | 7s |
| Evening (20 Sep) | 7ft (2.1m) | 7s |
Table - waves today at Waimanalo. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 26°C on Sat night, min 25°C on Sun afternoon). Mainly strong winds. | |||||||||||||||||||
Sat 19 | Sunday 20 | Monday 21 | |||||||||||||||||
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) | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 573 | 619 | 581 | 545 | 461 | 473 | 473 | 400 | 408 | 408 | 408 | 423 | 447 | 414 | 395 | 384 | 361 | 404 | 404 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | on | on | on | on | on | on | on |
High Tide | 12:22PM0.57m | 11:21PM0.27m | 12:47PM0.59m | ||||||||||||||||
Low Tide | 3:40AM0.12m | 7:51PM0.20m | 4:53AM0.10m | 7:29PM0.19m | |||||||||||||||
 |  | |  | | | | | | | | | | | | | | | | |
 | — | — | — | — | 6:18 | — | — | — | — | — | — | — | 6:18 | — | — | — | — | — | — |
 | 6:30 | — | — | — | — | — | — | — | 6:29 | — | — | — | — | — | — | — | 6:28 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 |
Feels °C | 24 | 24 | 25 | 25 | 25 | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 22 | 22 | 22 | 24 | 22 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | S 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
| kJ | 62 | 63 | 86 | 86 | 86 | 85 | 79 | 73 | 74 | 75 | 74 | 71 | 68 | 104 | 67 | 63 | 61 | 59 | 58 |
Swell 2 Height (m) Direction Period (s) | S 18 | S 18 | S 13 | S 13 | SSW 13 | N 11 | N 11 | N 11 | N 11 | N 11 | N 11 | N 10 | NNW 10 | N 10 | N 10 | NNW 10 | N 10 | NNW 10 | N 14 |
| kJ | 25 | 25 | 3 | 3 | 17 | 3 | 2 | 2 | 9 | 2 | 2 | 8 | 11 | 8 | 8 | 9 | 8 | 9 | 16 |
Swell 3 Height (m) Direction Period (s) | S 9 | S 9 | N 12 | N 12 | NW 12 | NW 9 | S 8 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | N 8 | NW 8 | NW 8 | NW 10 | NW 10 | N 15 | NNW 9 |
| kJ | 1 | 2 | 3 | 3 | 6 | 3 | 1 | 3 | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 4 | 4 | 17 | 9 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 573 | 619 | 581 | 545 | 461 | 473 | 473 | 400 | 408 | 408 | 408 | 423 | 447 | 414 | 395 | 384 | 361 | 404 | 404 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 52 | 50 | 44 | 44 | 44 | 44 | 50 | 52 | 52 | 50 | 50 | 50 | 44 | 44 | 44 | 44 | 52 | 44 | 44 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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