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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 Sunday 29 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
24.2° 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 4PM is: 0.4m 12s primary swell from a South-southwest direction (forecast issued at 07:00am March 29). An open ocean swell of 0.9m 11s is not directed at the surf break, a second open ocean swell of 0.9m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Mar) | 1.5ft (0.4m) | 12s |
| Afternoon (29 Mar) | 1.5ft (0.4m) | 12s |
| Evening (29 Mar) | 1.5ft (0.4m) | 12s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 29 | Monday 30 | Tuesday 31 | Wed 01 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 12 | 12 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 51 | 50 | 50 | 50 | 50 | 51 | 55 | 29 | 32 | 29 | 27 | 26 | 27 | 28 | 29 | 30 | 12 | 28 | 26 | 25 | 25 | 25 | 25 | 25 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | cross- off | cross- off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross- off | off | off | off | off |
High Tide / height (m) | 2:11PM 0.42 | 2:16AM 0.62 | 2:51PM 0.48 | 2:53AM 0.58 | 3:29PM 0.54 | |||||||||||||||||||
Low Tide / height (m) | 8:15AM 0.01 | 7:34PM 0.05 | 8:39AM -0.00 | 8:27PM 0.05 | 9:02AM -0.02 | 9:15PM 0.05 | ||||||||||||||||||
Sunday 29 | Monday 30 | Tuesday 31 | Wed 01 | |||||||||||||||||||||
| Sunrise | - | 6:22 | - | - | - | - | - | - | - | 6:20 | - | - | - | - | - | - | - | 6:20 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:38 | - | - | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:39 | - | - | - |
 |  |  | | | | | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 21 | 23 | 23 | 22 | 21 | 20 | 20 | 20 | 21 | 22 | 23 | 22 | 21 | 20 | 20 | 20 | 21 | 22 | 23 | 22 | 21 | 20 | 20 |
| Feels °C (?) | 15 | 16 | 18 | 18 | 17 | 17 | 16 | 17 | 16 | 17 | 18 | 19 | 18 | 18 | 17 | 18 | 17 | 18 | 18 | 19 | 18 | 17 | 17 | 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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