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Grandma's Surf Forecast
/ HAW – Maui (46 breaks) / Hawaii (267 breaks) /
Surf Forecasts
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Grandma's surf Forecast / HAW – Maui / USA
48hr Weather and Surf, issued 7 am Monday 20 May 2024 HST
Forecast update in hr min s 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 25.5°C (Statistics for 20 May 1981-2005 - mean: 25.2 °C max: 26.3 °C min: 24.1 °C)
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Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 25.5°C (Statistics for 20 May 1981-2005 - mean: 25.2 °C max: 26.3 °C min: 24.1 °C)
How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 10AM is: 0.7m 15s primary swell from a South direction and 0.3m 5s secondary swell from a South-southwest direction (forecast issued at 07:00am May 20). An open ocean swell of 1.0m 6s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 2.5ft (0.7m) | 15s |
| Afternoon (20 May) | 2.5ft (0.7m) | 15s |
| Evening (20 May) | 2.5ft (0.7m) | 14s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 | 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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Swell Height Map |    |    |    |    |    |    |    |    | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 18 | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 18 | 18 | 18 | 18 | 18 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 15 | 15 | 14 | 14 | 13 | 13 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Energy (?) | 337 | 242 | 215 | 209 | 218 | 218 | 215 | 150 | 148 | 138 | 130 | 89 | 123 | 125 | 126 | 87 | 87 | 55 | 81 | 80 | 111 | 80 | 79 | 75 | 68 | 127 | 127 | 127 | 127 | 125 | 125 | 80 | 150 | 150 | 150 | 87 | 124 | 124 | 124 | 169 | 169 | 122 | 119 | 113 | 109 | 106 | 106 | 104 | 84 | 82 | 82 | 84 | 86 | 49 | 48 | 45 | 45 | 56 | 81 | 81 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | on | off | cross | glass | glass | cross- off | glass | glass | glass | glass | glass | glass | glass | glass | glass | cross- off | on | cross- on | glass | glass | glass | cross- off | off | glass | glass | cross- off | off | cross- off | cross- off | cross- off | off | off | glass | cross- off | off | off | off | cross- off | off | cross- off | glass | cross- off | off | off | off | off | off | off | glass | cross- off | off | off | off | off | off | off | glass | cross- off |
High Tide / height (m) | 2:45PM 0.65 | 2:24AM 0.34 | 3:21PM 0.70 | 3:04AM 0.29 | 3:58PM 0.73 | 3:43AM 0.26 | 4:35PM 0.76 | 4:24AM 0.23 | 5:16PM 0.77 | 5:10AM 0.20 | 5:59PM 0.77 | 6:06AM 0.19 | 6:46PM 0.75 | 7:16AM 0.19 | ||||||||||||||||||||||||||||||||||||||||||||||
Low Tide / height (m) | 7:30AM -0.03 | 9:08PM 0.12 | 7:59AM -0.04 | 9:58PM 0.10 | 8:30AM -0.04 | 10:47PM 0.09 | 9:03AM -0.04 | 11:36PM 0.08 | 9:38AM -0.04 | 12:25AM 0.07 | 10:17AM -0.03 | 1:17AM 0.06 | 11:02AM -0.00 | 2:09AM 0.05 | 11:53AM 0.03 | |||||||||||||||||||||||||||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sunrise | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:45 | - | - |
| Sunset | - | - | - | - | 6:58 | - | - | - | - | - | - | - | 6:59 | - | - | - | - | - | - | - | 6:59 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - |
 |  |  | | |  |  | | | | | | | | | | | | | | | | | | | | |  | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 23 | 23 | 24 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 26 | 26 | 25 | 24 | 23 | 23 | 22 | 24 | 26 | 26 | 25 | 24 | 23 | 23 | 23 | 24 | 25 | 26 | 25 | 24 | 23 | 23 | 22 | 24 | 26 | 26 | 25 | 24 | 23 | 23 | 22 | 24 | 25 | 25 |
| Feels °C (?) | 28 | 28 | 27 | 27 | 27 | 28 | 27 | 25 | 25 | 27 | 29 | 29 | 28 | 28 | 28 | 26 | 27 | 26 | 28 | 28 | 28 | 28 | 28 | 26 | 26 | 26 | 29 | 27 | 26 | 25 | 25 | 24 | 23 | 25 | 28 | 26 | 25 | 24 | 23 | 24 | 24 | 25 | 26 | 27 | 25 | 24 | 24 | 24 | 23 | 25 | 27 | 26 | 24 | 24 | 23 | 24 | 22 | 24 | 27 | 26 |
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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