Surf Forecasts:
How big are the waves at Old Kona Airport State Park today (21 Jul):
- Morning surf: Morning surf (21 Jul, local time) - 1.5ft (0.4m), 17s period with SW swell.
- Afternoon surf: Afternoon surf (21 Jul, local time) - 1.5ft (0.4m), 17s period with SW swell.
- Evening surf: Evening surf (21 Jul, local time) - 1.5ft (0.4m), 16s period with SW swell.
The current surf forecast for Old Kona Airport State Park at 2PM is: 0.4m 17s primary swell from a South-southwest direction and 0.4m 7s secondary swell from a North-northeast direction (forecast issued at 07:00am July 21). An open ocean swell of 1.0m 14s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jul) | 1.5ft (0.4m) | 17s |
| Afternoon (21 Jul) | 1.5ft (0.4m) | 17s |
| Evening (21 Jul) | 1.5ft (0.4m) | 16s |
Table - waves today at Old Kona Airport State Park. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Wed afternoon. Warm (max 27°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | |||||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
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) | SW 16 | SW 17 | SW 17 | SSW 17 | SW 16 | SW 16 | SSW 26 | SSW 26 | NNE 7 | NNE 6 | NNE 6 | SSW 24 | SSW 23 | SSW 22 | SSW 22 | SSW 21 | SSW 21 | SSW 20 | SSW 20 | SSW 20 | SSW 20 | SSW 19 | SSW 19 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 69 | 72 | 73 | 109 | 67 | 63 | 224 | 222 | 38 | 37 | 35 | 433 | 550 | 634 | 616 | 611 | 643 | 584 | 517 | 512 | 671 | 657 | 624 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross-on | on | cross-on | cross-on | glassy | cross | cross | on | on | cross | cross | on | cross-on | glassy | cross | cross-on | on | cross-on | cross | on |
High Tide | 10:36AM0.51m | 8:40PM0.30m | 11:37AM0.56m | 9:45PM0.25m | 12:30PM0.61m | ||||||||||||||||||
Low Tide | 2:59AM0.03m | 5:17PM0.27m | 3:40AM0.03m | 7:08PM0.23m | 4:27AM0.03m | 8:14PM0.19m | |||||||||||||||||
 |  | |  | | | | | | | | |  |  | | | | | | | |  | | |
 | 5:56 | — | — | — | — | — | — | — | 5:56 | — | — | — | — | — | — | — | 5:56 | — | — | — | — | — | — |
 | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 29 | 31 | 29 | 28 | 29 | 28 | 28 | 30 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 11 | S 11 | NNE 6 | S 13 | S 13 | S 13 | SSW 22 | SSW 21 | SSW 21 | SSW 20 | SSW 20 | SSW 20 | SSW 20 | SSW 19 | SSW 19 |
| kJ | 412 | 401 | 390 | 384 | 368 | 347 | 336 | 331 | 114 | 112 | 35 | 260 | 260 | 199 | 616 | 611 | 643 | 584 | 517 | 512 | 671 | 657 | 624 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | S 13 | S 13 | S 11 | NNE 6 | NNE 6 | NNE 6 | S 12 | S 12 | S 12 | S 12 | NNE 6 | S 13 | NNE 6 | NNE 6 | S 13 |
| kJ | 27 | 18 | 18 | 18 | 30 | 31 | 31 | 31 | 171 | 168 | 110 | 40 | 49 | 37 | 190 | 184 | 100 | 166 | 54 | 225 | 52 | 47 | 215 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 17 | SW 17 | SSW 17 | SW 16 | SW 16 | SSW 26 | SSW 26 | NNE 7 | NNE 6 | S 13 | SSW 24 | SSW 23 | SSW 22 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | S 11 | NNE 6 | S 13 | S 11 | NNE 6 |
| kJ | 69 | 72 | 73 | 109 | 67 | 63 | 224 | 222 | 38 | 37 | 123 | 433 | 550 | 634 | 37 | 27 | 21 | 31 | 123 | 54 | 222 | 81 | 38 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 5 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 2 | 0 | 100 | 100 | 101 | 6 | 6 | 0 | 11 | 46 | 115 | 104 | 11 | 11 | 2 | 99 | 0 | 4 | 115 | 127 | 127 | 23 | 99 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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