Surf Forecasts:
How big are the waves at Grandma's today (16 Sep):
- Morning surf: Morning surf (16 Sep, local time) - 2.5ft (0.7m), 18s period with SW swell.
- Afternoon surf: Afternoon surf (16 Sep, local time) - 2.5ft (0.7m), 18s period with SW swell.
- Evening surf: Evening surf (16 Sep, local time) - 2.5ft (0.7m), 18s period with SW swell.
The current surf forecast for Grandma's at 12PM is: 0.7m 18s primary swell from a Southwest direction and 0.2m 12s secondary swell from a South-southwest direction (forecast issued at 07:00am September 16). An open ocean swell of 0.9m 5s 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 (16 Sep) | 2.5ft (0.7m) | 18s |
| Afternoon (16 Sep) | 2.5ft (0.7m) | 18s |
| Evening (16 Sep) | 2.5ft (0.7m) | 18s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 17mm), heaviest on Thu afternoon. Warm (max 29°C on Wed afternoon, min 25°C on Thu night). Wind will be generally light. | |||||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||||||||
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 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 | SSW 18 | SSW 18 | SSW 17 | SW 17 | SW 17 | SSW 17 | SSW 17 | SSW 17 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 281 | 255 | 319 | 316 | 316 | 316 | 312 | 302 | 274 | 264 | 261 | 261 | 264 | 199 | 381 | 541 | 480 | 386 | 298 | 302 | 368 | 373 | 351 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | off | off | off | off | off | off | glassy | glassy | cross-off | cross-off | off | off | off | off | glassy | cross-off | cross-off | off | off |
High Tide | 8:00AM0.66m | 7:20PM0.33m | 9:04AM0.66m | 8:49PM0.30m | 10:11AM0.66m | 10:26PM0.30m | |||||||||||||||||
Low Tide | 2:40PM0.26m | 1:04AM0.12m | 4:27PM0.26m | 2:00AM0.14m | 6:00PM0.23m | ||||||||||||||||||
 |  | | | | | | |  |  | |  | |  | | | | | | | | | | |
 | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — |
 | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:27 | — | — | — | — | — | — | — | 6:25 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | 6 | 4 | 1 | 1 | 2 | 1 | — | — | — | — | — |
Temp °C | 26 | 27 | 28 | 29 | 29 | 27 | 26 | 26 | 26 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 25 | 26 | 29 | 29 | 28 | 27 | 26 |
Feels °C | 29 | 29 | 30 | 30 | 30 | 28 | 27 | 28 | 29 | 29 | 32 | 32 | 32 | 30 | 29 | 29 | 27 | 28 | 32 | 30 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | 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 | SSW 18 | SSW 18 | SSW 17 | SW 17 | SW 17 | SSW 17 | SSW 17 | SSW 17 |
| kJ | 281 | 255 | 319 | 316 | 316 | 316 | 312 | 302 | 274 | 264 | 261 | 261 | 264 | 164 | 381 | 541 | 480 | 386 | 298 | 302 | 368 | 373 | 351 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SW 11 | SW 11 | SW 11 | NNE 7 | NNE 7 | NNE 7 | SSW 19 | NNE 7 | SE 7 | SE 6 | SE 6 | SSW 17 | ESE 6 | SE 7 | SE 5 | ESE 6 |
| kJ | 14 | 23 | 14 | 13 | 12 | 12 | 12 | 19 | 19 | 19 | 21 | 18 | 17 | 199 | 9 | 11 | 8 | 10 | 101 | 8 | 11 | 7 | 8 |
Swell 3 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | SSE 8 | SSE 6 | N 8 | N 8 | S 8 | S 8 | SE 11 | SW 20 | SW 20 | SW 20 | ESE 5 | SE 7 | N 7 | NNE 7 | N 7 | ESE 6 | SSW 16 | SSW 16 | SSW 16 | SSW 16 |
| kJ | 5 | 5 | 10 | 7 | 3 | 6 | 5 | 1 | 1 | 4 | 99 | 98 | 97 | 3 | 11 | 9 | 10 | 4 | 8 | 50 | 50 | 51 | 51 |
Wind waves Height (m) Direction Period (s) | — | — | E 5 | NNE 6 | NNE 7 | NNE 4 | NNE 4 | NNE 3 | NNE 3 | NNE 7 | E 6 | E 9 | E 9 | NNE 7 | E 7 | E 7 | E 6 | E 6 | E 6 | E 6 | E 8 | E 6 | E 6 |
| kJ | — | — | 27 | 6 | 15 | 11 | 8 | 10 | 6 | 37 | 78 | 593 | 465 | 17 | 255 | 255 | 188 | 154 | 212 | 178 | 287 | 170 | 202 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 12 | 12 | 12 | 12 | 12 | 12 | 4 | 4 | 14 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 4 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
Header Global | |||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Grandma's surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest