Surf Forecasts:
How big are the waves at Grandma's today (20 Oct):
- Morning surf: Morning surf (20 Oct, local time) - 1ft (0.3m), 16s period with SW swell.
- Afternoon surf: Afternoon surf (20 Oct, local time) - 0.5ft (0.2m), 15s period with SSW swell.
- Evening surf: Evening surf (20 Oct, local time) - 0.5ft (0.2m), 15s period with SSW swell.
The current surf forecast for Grandma's at 5AM is: 0.3m 16s primary swell from a Southwest direction (forecast issued at 01:00am October 20). An open ocean swell of 0.3m 7s is not directed at the surf break, a second open ocean swell of 0.4m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Oct) | 1ft (0.3m) | 16s |
| Afternoon (20 Oct) | 0.5ft (0.2m) | 15s |
| Evening (20 Oct) | 0.5ft (0.2m) | 15s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Tue morning, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 20 | Wednesday 21 | Thursday 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) | SW 16 | SW 16 | SW 16 | SW 16 | SSW 15 | S 11 | SSW 14 | SSW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 39 | 39 | 40 | 40 | 22 | 9 | 20 | 22 | 39 | 39 | 63 | 60 | 57 | 55 | 54 | 54 | 54 | 54 | 53 | 52 | 49 | 47 | 46 | 45 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | cross-off | off | glassy | glassy | glassy | off | glassy | glassy | glassy | glassy | glassy | glassy | off | off | cross-off |
High Tide | 00:14AM0.39m | 12:02PM0.65m | 00:57AM0.46m | 12:45PM0.63m | 1:37AM0.53m | 1:25PM0.60m | ||||||||||||||||||
Low Tide | 4:59AM0.20m | 6:42PM0.10m | 6:05AM0.18m | 7:08PM0.07m | 7:04AM0.16m | 7:34PM0.05m | ||||||||||||||||||
 | |  | | | | | |  | | | |  | | | | | | | | | | | | |
 | — | 6:22 | — | — | — | — | — | — | — | 6:22 | — | — | — | — | — | — | — | 6:24 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:57 | — | — | — | — | — | — | — | 5:57 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 23 | 24 | 27 | 27 | 26 | 24 | 24 | 23 | 23 | 24 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 25 | 26 | 27 | 26 | 25 | 24 |
Feels °C | 24 | 22 | 22 | 26 | 26 | 25 | 23 | 23 | 24 | 25 | 25 | 27 | 28 | 28 | 26 | 27 | 26 | 26 | 28 | 28 | 30 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 6 | NNE 7 | NNE 7 | SE 6 | SE 6 | SE 5 | SSW 14 | SSW 15 | SE 6 | SE 6 | SE 6 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 |
| kJ | 10 | 10 | 10 | 9 | 6 | 4 | 20 | 22 | 8 | 8 | 5 | 60 | 57 | 55 | 54 | 54 | 54 | 54 | 53 | 52 | 49 | 47 | 46 | 45 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | SW 16 | SW 16 | NNE 7 | NNE 7 | N 7 | N 6 | N 7 | SW 16 | NNE 7 | SW 16 | NNE 7 | NNE 7 | N 7 | N 7 | N 7 | NNE 6 | SE 5 | SE 5 | SE 4 | NNE 8 | NE 5 | NNE 8 | N 8 |
| kJ | 10 | 39 | 40 | 10 | 9 | 8 | 3 | 3 | 39 | 10 | 63 | 9 | 5 | 8 | 8 | 4 | 4 | 5 | 4 | 3 | 7 | 5 | 13 | 11 |
Swell 3 Height (m) Direction Period (s) | SW 16 | S 11 | S 11 | SW 16 | SSW 15 | S 11 | S 11 | S 11 | NNE 7 | SW 16 | NNE 7 | ESE 5 | S 12 | SSE 5 | SSE 5 | S 11 | ESE 5 | N 6 | N 8 | N 8 | S 11 | S 11 | NW 11 | NW 12 |
| kJ | 39 | 21 | 21 | 40 | 22 | 9 | 9 | 9 | 9 | 39 | 9 | 3 | 11 | 2 | 2 | 10 | 3 | 3 | 5 | 5 | 9 | 9 | 19 | 22 |
Wind waves Height (m) Direction Period (s) | — | ESE 6 | ESE 6 | E 6 | E 6 | E 6 | E 6 | SE 6 | E 6 | E 6 | E 6 | E 7 | — | — | E 8 | E 5 | E 5 | E 5 | E 5 | E 5 | — | E 7 | E 7 | E 7 |
| kJ | — | 12 | 10 | 187 | 148 | 98 | 144 | 8 | 175 | 188 | 143 | 131 | — | — | 163 | 29 | 42 | 93 | 76 | 29 | — | 88 | 107 | 130 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 12 | 13 | 12 | 12 | 4 | 12 | 12 | 12 | 15 | 13 | 12 | 4 | 4 | 4 | 4 | 4 | 16 | 13 | 12 | 12 |
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