Surf Forecasts:
How big are the waves at Grandma's today (18 Jul):
- Morning surf: Morning surf (18 Jul, local time) - 2ft (0.6m), 14s period with SSW swell.
- Afternoon surf: Afternoon surf (18 Jul, local time) - 1.5ft (0.5m), 14s period with SSW swell.
- Evening surf: Evening surf (18 Jul, local time) - 1.5ft (0.5m), 14s period with SSW swell.
The current surf forecast for Grandma's at 5AM is: 0.6m 14s primary swell from a South-southwest direction (forecast issued at 01:00am July 18). An open ocean swell of 0.4m 7s is not directed at the surf break, a second open ocean swell of 1.8m 7s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Jul) | 2ft (0.6m) | 14s |
| Afternoon (18 Jul) | 1.5ft (0.5m) | 14s |
| Evening (18 Jul) | 1.5ft (0.5m) | 14s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 28°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 14 | S 14 | SSW 14 | SSW 14 | SSW 14 | S 12 | S 12 | S 12 | S 12 | S 19 | S 18 | S 18 | S 18 | S 17 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 172 | 158 | 149 | 154 | 93 | 158 | 113 | 113 | 80 | 75 | 76 | 78 | 62 | 101 | 99 | 97 | 147 | 132 | 185 | 325 | 321 | 309 | 279 | 267 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | glassy | off | off | off | off | off | off | cross-off | glassy | off | off | off | off | cross-off | cross-off | off | cross-off | glassy | off | off | off |
High Tide | 7:33AM0.41m | 7:13PM0.61m | 8:36AM0.46m | 7:52PM0.51m | 9:40AM0.52m | 8:35PM0.43m | ||||||||||||||||||
Low Tide | 1:17AM0.03m | 12:32PM0.15m | 1:49AM0.03m | 1:38PM0.22m | 2:23AM0.03m | 3:01PM0.27m | ||||||||||||||||||
 | |  | |  | | |  | | | | | | | | | | | | | | | | | |
 | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 27 | 28 | 27 | 26 | 25 | 24 | 24 | 25 | 27 | 28 | 27 | 25 | 25 | 24 | 24 | 25 | 27 | 27 | 27 | 26 | 25 |
Feels °C | 29 | 27 | 28 | 30 | 30 | 28 | 28 | 26 | 24 | 25 | 25 | 28 | 29 | 27 | 25 | 26 | 25 | 25 | 26 | 29 | 30 | 29 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 14 | SSW 14 | SSW 14 | SSW 14 | S 12 | S 12 | S 12 | S 12 | SSW 13 | SSW 12 | SSW 12 | S 18 | S 17 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 |
| kJ | 172 | 158 | 149 | 154 | 93 | 158 | 113 | 113 | 80 | 75 | 76 | 78 | 55 | 50 | 49 | 97 | 147 | 132 | 185 | 325 | 321 | 309 | 279 | 267 |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 7 | SE 7 | W 13 | W 13 | SE 6 | SE 5 | SE 5 | W 13 | W 13 | S 19 | S 19 | S 19 | S 18 | S 18 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SW 18 | NNE 7 | NNE 5 | NNE 6 | SW 17 |
| kJ | 12 | 12 | 12 | 30 | 30 | 9 | 5 | 5 | 29 | 28 | 66 | 65 | 62 | 101 | 99 | 47 | 41 | 40 | 43 | 51 | 10 | 6 | 7 | 45 |
Swell 3 Height (m) Direction Period (s) | WNW 14 | WNW 13 | WNW 13 | SE 7 | SE 6 | W 13 | W 13 | W 13 | SE 5 | S 19 | NNE 7 | NNE 7 | NNE 7 | NNE 5 | NNE 8 | N 8 | SSW 19 | SW 19 | NNE 7 | NNE 7 | SW 18 | SW 18 | SW 18 | W 11 |
| kJ | 61 | 59 | 58 | 14 | 5 | 30 | 30 | 30 | 4 | 30 | 5 | 5 | 11 | 5 | 11 | 5 | 35 | 56 | 5 | 5 | 50 | 50 | 49 | 10 |
Wind waves Height (m) Direction Period (s) | E 6 | E 7 | E 7 | E 7 | E 6 | E 8 | E 6 | E 6 | E 5 | ESE 5 | E 5 | E 5 | E 5 | — | E 8 | E 8 | E 8 | E 5 | E 8 | E 8 | — | — | E 8 | NNE 3 |
| kJ | 261 | 278 | 220 | 302 | 244 | 417 | 101 | 77 | 55 | 33 | 37 | 29 | 50 | — | 132 | 156 | 156 | 20 | 116 | 113 | — | — | 110 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 4 | 12 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 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