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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 1 am Wednesday 25 Mar 2026 HSTForecast update in hr min s Forecast update imminent
Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grandma's sea temperature is
24.5° C
(Which is normal for this time of year)How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 9AM is: 0.4m 13s primary swell from a Southwest direction (forecast issued at 01:00am March 25). An open ocean swell of 0.6m 9s is not directed at the surf break, a second open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Mar) | 1.5ft (0.4m) | 13s |
| Afternoon (25 Mar) | 1.5ft (0.4m) | 13s |
| Evening (25 Mar) | 1ft (0.3m) | 13s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 25 | Thursday 26 | Friday 27 | ||||||||||||||||||||||
| 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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 14 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 46 | 44 | 44 | 44 | 44 | 44 | 44 | 27 | 43 | 42 | 42 | 17 | 35 | 34 | 33 | 51 | 49 | 36 | 45 | 61 | 106 | 106 | 104 | 92 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | cross- off | cross- off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 9:42PM 0.68 | 10:02AM 0.20 | 10:52PM 0.68 | 11:29AM 0.23 | 11:54PM 0.69 | 12:34PM 0.29 | ||||||||||||||||||
Low Tide / height (m) | 5:28AM 0.12 | 2:47PM 0.04 | 6:33AM 0.09 | 4:08PM 0.06 | 7:15AM 0.05 | 5:26PM 0.06 | ||||||||||||||||||
Wednesday 25 | Thursday 26 | Friday 27 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:24 | - | - | - | - | - | - | - | 6:24 | - | - | - | - | - | - | - | 6:24 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:38 | - | - | - | - | - | - | - | 6:38 | - |
 | | |  | | | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 21 | 21 | 22 | 23 | 24 | 23 | 22 | 21 | 21 | 20 | 21 | 23 | 24 | 23 | 21 | 21 | 21 | 20 | 21 | 22 | 23 | 22 | 21 |
| Feels °C (?) | 20 | 19 | 19 | 20 | 20 | 22 | 21 | 20 | 19 | 19 | 19 | 20 | 22 | 23 | 21 | 19 | 20 | 20 | 19 | 19 | 20 | 21 | 19 | 18 |
- 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.
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