Surf Forecasts:
How big are the waves at Grandma's today (15 Sep):
- Morning surf: Morning surf (15 Sep, local time) - 2ft (0.6m), 20s period with SSW swell.
- Afternoon surf: Afternoon surf (15 Sep, local time) - 2ft (0.6m), 20s period with SSW swell.
- Evening surf: Evening surf (15 Sep, local time) - 2ft (0.6m), 19s period with SW swell.
The current surf forecast for Grandma's at 10AM is: 0.6m 20s primary swell from a South-southwest direction and 0.4m 13s secondary swell from a Southwest direction (forecast issued at 07:00am September 15). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Sep) | 2ft (0.6m) | 20s |
| Afternoon (15 Sep) | 2ft (0.6m) | 20s |
| Evening (15 Sep) | 2ft (0.6m) | 19s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Thu afternoon. Warm (max 29°C on Wed morning, min 26°C on Tue morning). Wind will be generally light. | |||||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||||||||
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 21 | SW 21 | SW 20 | SSW 20 | SSW 19 | SW 19 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 16 | SSW 17 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 160 | 210 | 309 | 253 | 251 | 303 | 303 | 296 | 281 | 255 | 319 | 316 | 316 | 316 | 312 | 302 | 274 | 264 | 261 | 261 | 264 | 199 | 377 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | glassy | glassy | glassy | off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | off | off | off | off | off | glassy | cross-on | glassy | off | off |
High Tide | 7:04AM0.66m | 6:29PM0.37m | 8:00AM0.66m | 7:20PM0.33m | 9:04AM0.66m | 8:49PM0.30m | |||||||||||||||||
Low Tide | 1:21PM0.24m | 00:20AM0.09m | 2:40PM0.26m | 1:04AM0.12m | 4:27PM0.26m | ||||||||||||||||||
 |  |  | | |  | | | | | | | | | | | | | |  | |  | | |
 | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — |
 | — | — | — | — | 6:29 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:27 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 3 | 2 | — |
Temp °C | 25 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 29 | 29 | 28 | 26 | 26 | 26 | 26 | 27 | 28 | 29 | 29 | 27 | 26 |
Feels °C | 27 | 28 | 32 | 33 | 32 | 31 | 29 | 29 | 28 | 29 | 31 | 31 | 28 | 27 | 27 | 28 | 28 | 31 | 33 | 33 | 33 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 21 | SW 21 | SW 20 | SSW 20 | SSW 19 | SW 19 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 16 | SSW 17 |
| kJ | 160 | 210 | 309 | 253 | 251 | 303 | 303 | 296 | 281 | 255 | 319 | 316 | 316 | 316 | 312 | 302 | 274 | 264 | 261 | 261 | 264 | 164 | 377 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SW 13 | SW 13 | SSW 12 | NNE 8 | NNE 8 | SW 12 | SW 12 | SSW 12 | SW 12 | SSW 12 | N 7 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SW 11 | NNE 7 | NNE 7 | SE 6 | SE 5 | SSW 19 | ESE 6 |
| kJ | 57 | 43 | 42 | 31 | 19 | 11 | 38 | 23 | 14 | 23 | 14 | 8 | 24 | 12 | 12 | 12 | 19 | 18 | 21 | 8 | 7 | 199 | 8 |
Swell 3 Height (m) Direction Period (s) | SW 18 | NNE 8 | NNE 8 | WSW 8 | SW 12 | SW 12 | NNE 8 | NNE 8 | NNE 7 | NNE 7 | NNE 7 | SSW 11 | E 8 | SSE 8 | W 9 | NNE 8 | S 8 | SW 11 | SW 20 | NNE 7 | SW 20 | NNE 7 | NNE 7 |
| kJ | 12 | 12 | 6 | 7 | 38 | 38 | 11 | 11 | 5 | 5 | 10 | 13 | 6 | 6 | 6 | 7 | 1 | 19 | 99 | 10 | 97 | 11 | 10 |
Wind waves Height (m) Direction Period (s) | NNE 8 | — | E 4 | N 8 | W 8 | E 5 | E 5 | E 5 | E 10 | E 10 | E 5 | E 5 | NNW 8 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | E 10 | E 10 | E 6 | E 6 | E 9 | E 6 |
| kJ | 12 | — | 16 | 10 | 12 | 29 | 74 | 49 | 212 | 165 | 36 | 83 | 24 | 11 | 12 | 9 | 7 | 279 | 417 | 185 | 169 | 493 | 128 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 12 | 12 | 12 | 12 | 12 | 12 | 4 | 4 | 14 | 4 | 12 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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