Surf Forecasts:
How big are the waves at Kahuku Ranch today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 3ft (0.9m), 15s period with SSW swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 3ft (0.9m), 15s period with SSW swell.
- Evening surf: Evening surf (20 Sep, local time) - 3ft (0.9m), 14s period with SSW swell.
The current surf forecast for Kahuku Ranch at 4AM is: 0.8m 16s primary swell from a South-southwest direction and 0.3m 15s secondary swell from a Southwest direction (forecast issued at 01:00am September 20). An open ocean swell of 2.1m 9s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 3ft (0.9m) | 15s |
| Afternoon (20 Sep) | 3ft (0.9m) | 15s |
| Evening (20 Sep) | 3ft (0.9m) | 14s |
Table - waves today at Kahuku Ranch. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 29°C on Mon morning, min 26°C on Sun night). Winds increasing (light winds from the NNE on Sun night, fresh winds from the E by Tue morning). | ||||||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||||||||||
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 | 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) | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | S 12 | S 12 | S 12 | S 13 | S 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 341 | 419 | 365 | 360 | 360 | 355 | 346 | 327 | 313 | 308 | 304 | 295 | 295 | 229 | 229 | 222 | 212 | 205 | 155 | 146 | 146 | 153 | 166 | 168 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:26PM0.36m | 12:09PM0.75m | 00:35AM0.42m | 12:52PM0.80m | 1:14AM0.49m | 1:27PM0.83m | ||||||||||||||||||
Low Tide | 4:15AM0.28m | 7:35PM0.27m | 5:41AM0.25m | 7:52PM0.22m | 6:38AM0.21m | 8:10PM0.18m | ||||||||||||||||||
 | |  | | | |  |  | | |  | | | | | | | | | | | | | | |
 | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 29 | 28 | 28 | 27 | 27 | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 26 |
Feels °C | 26 | 27 | 25 | 26 | 28 | 27 | 26 | 25 | 26 | 28 | 28 | 30 | 30 | 29 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | E 9 | E 9 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | S 12 | S 12 | S 12 | S 13 | S 13 |
| kJ | 341 | 419 | 365 | 360 | 360 | 355 | 346 | 327 | 313 | 308 | 304 | 529 | 476 | 229 | 229 | 222 | 212 | 205 | 155 | 146 | 146 | 153 | 166 | 168 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | W 12 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | W 11 | W 11 | S 15 | S 15 | SSW 19 | SSW 19 | SW 17 | SW 17 |
| kJ | 58 | 33 | 33 | 34 | 34 | 34 | 21 | 21 | 21 | 21 | 11 | 295 | 295 | 19 | 19 | 19 | 10 | 10 | 39 | 38 | 36 | 34 | 45 | 46 |
Swell 3 Height (m) Direction Period (s) | SSE 8 | S 12 | S 12 | S 12 | W 13 | W 13 | W 13 | W 13 | W 12 | W 12 | S 11 | W 12 | W 12 | W 11 | W 11 | W 11 | SSW 14 | SSW 14 | W 13 | W 13 | W 13 | W 12 | W 12 | W 12 |
| kJ | 6 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 12 | 11 | 2 | 11 | 11 | 10 | 10 | 9 | 19 | 19 | 13 | 13 | 13 | 11 | 11 | 25 |
Wind waves Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 | E 9 |
| kJ | 708 | 656 | 623 | 720 | 649 | 669 | 686 | 756 | 847 | 692 | 572 | 660 | 588 | 505 | 579 | 667 | 526 | 396 | 454 | 525 | 685 | 788 | 937 | 1085 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 75 | 81 | 62 | 62 | 62 | 200 | 100 | 75 | 62 | 62 | 0 | 0 | 0 | 0 | 0 | 62 | 62 | 62 | 62 | 62 | 62 | 112 | 112 | 62 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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