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Grandma's Surf Forecast
/ HAW – Maui (46 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Grandma's surfForecast / HAW – Maui / USA
48hr Weather and Surf, issued 7 am Saturday 18 Oct 2025 HST
How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 1PM is: 0.5m 13s primary swell from a Northwest direction (forecast issued at 07:00am October 18). An open ocean swell of 0.4m 6s is not directed at the surf break, a second open ocean swell of 1.5m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Oct) | 1.5ft (0.5m) | 13s |
| Afternoon (18 Oct) | 1.5ft (0.4m) | 16s |
| Evening (18 Oct) | 1.5ft (0.4m) | 16s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| 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 | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 13 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 5 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 63 | 64 | 82 | 63 | 63 | 62 | 60 | 58 | 57 | 56 | 56 | 55 | 54 | 54 | 33 | 33 | 32 | 32 | 32 | 19 | 19 | 18 | 0 | 5 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | cross- off | off | off | off | off | off | off | cross- off | off | off | cross- off | cross- off | cross- off | cross- off | off | glass | off | off | cross- off | off | off |
High Tide / height (m) | 2:10AM 0.56 | 2:02PM 0.59 | 2:47AM 0.62 | 2:37PM 0.54 | 3:21AM 0.67 | 3:10PM 0.49 | ||||||||||||||||||
Low Tide / height (m) | 7:47AM 0.16 | 8:08PM 0.05 | 8:37AM 0.16 | 8:31PM 0.04 | 9:23AM 0.16 | 8:55PM 0.04 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| Sunrise | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 5:59 | - | - | - | - | - | - | - | 5:59 | - | - | - | - | - | - | - | 5:58 | - | - | - |
 |  |  | | | | |  | | | | | | | | | |  | | | | | | | |
Rain (mm) | - | - | 1 | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - |
| Temp. °C | 25 | 25 | 27 | 28 | 27 | 26 | 25 | 25 | 24 | 25 | 27 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 25 | 25 | 24 |
| Feels °C (?) | 26 | 26 | 30 | 30 | 27 | 28 | 26 | 26 | 24 | 26 | 29 | 29 | 29 | 28 | 27 | 27 | 27 | 26 | 30 | 29 | 29 | 26 | 26 | 25 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for HAW - Maui
The wind is still offshore at Grandma's (light winds from the NE at Wailuku Heights wx 10 km from Grandma's). 0.3m 8s swell from the SSE with a 0.2m 13s groundswell from the SSW. 2 swells combining to make bigger set waves.
1 h 43 min ago
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.
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