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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 pm Wednesday 15 Apr 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
24.7° 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 7PM is: 0.6m 12s primary swell from a South direction and 0.4m 13s secondary swell from a South-southwest direction (forecast issued at 01:00pm April 15). The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Apr) | 2.5ft (0.7m) | 12s |
| Afternoon (15 Apr) | 2.5ft (0.7m) | 12s |
| Evening (15 Apr) | 1.5ft (0.5m) | 12s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||||||||
| 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 | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 15 | 12 | 12 | 12 | 12 | 12 | 12 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 144 | 144 | 141 | 72 | 71 | 69 | 69 | 69 | 68 | 65 | 63 | 60 | 61 | 61 | 93 | 87 | 84 | 86 | 86 | 82 | 80 | 55 | 55 | 54 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross | cross | glass | off | cross- off | glass | glass | glass | glass | cross- off | cross- off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | glass | glass | cross- off | cross- off |
High Tide / height (m) | 3:09PM 0.61 | 3:03AM 0.46 | 3:49PM 0.68 | 3:42AM 0.41 | 4:32PM 0.73 | 4:23AM 0.34 | ||||||||||||||||||
Low Tide / height (m) | 8:25AM -0.05 | 9:08PM 0.04 | 8:54AM -0.07 | 10:03PM 0.04 | 9:26AM -0.08 | 10:59PM 0.05 | ||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 |
| Sunset | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - |
 |  | |  | | |  | | | | | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 24 | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 24 |
| Feels °C (?) | 28 | 27 | 27 | 27 | 27 | 25 | 26 | 27 | 28 | 28 | 27 | 25 | 24 | 24 | 25 | 26 | 27 | 26 | 27 | 26 | 28 | 27 | 26 | 27 |
- 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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