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Surf Forecasts:

Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle12 Day Weather and Surf, issued 7 am Friday 30 Jan 2026 HST
Forecast 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
25.3° C
 (Which is 1.0°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Grandma's this week:

The surf forecast for Grandma's over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jan 30) at 5PM. The primary swell is predicted to be 0.8m and 18s period with a secondary swell of 0.9m and 14s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Grandma's in the next 12 days are 2.1m 17s and forecast to arrive on Wednesday (Feb 04) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 16s period and expected on Wednesday (Feb 04) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Fri 30th Jan)2.5ft (0.8m) 18s
Best Surf11PM (Fri 30th Jan)5ft (1.6m) 17s
Most Powerful11AM (Wed 4th Feb)7ft (2.1m) 17s

Table - best surf conditions forecast for Grandma's over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 3mm), mostly falling on Fri night. Warm (max 25°C on Fri morning, min 22°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 15mm), heaviest on Tue morning. Warm (max 25°C on Mon afternoon, min 20°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Wed night).

Friday
30
Saturday
31
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
3
0
3
3
2
0
0
0
0
0
0
0
3
4
4
0
4
2
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
NW
0.8
NW
0.2
SSW
1.6
NW
1.3
NW
1.1
NW
0.8
NW
0.7
NW
0.5
NW
0.3
NW
0.4
NW
0.8
NW
0.9
WSW
2.1
NW
1.9
NW
2.1
NW
0.2
SSW
1.9
NW
1.5
NW
1.3
NW
1.1
NW
Period(s) (?)14181416151413131219171171515171315141413
Wave
Graph
(?)Metric surfscale
Energy kJ (?)447370211164685416196156675710315086213015852512171486902586374
Wind
(km/h)
5
W
10
NNW
20
NNE
10
N
10
NNE
5
ENE
10
SSW
10
SW
15
SSW
25
SSW
25
SSW
20
SW
10
SSW
15
NNE
15
N
20
NNE
20
NNE
5
ENE
5
WSW
5
W
15
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
off		offcross-
off		cross-
off		glassononcross-
on		ononononcross-
off		cross-
off		offoffcross-
off		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
2:30PM
0.26
3:11AM
0.85
3:19PM
0.29
3:53AM
0.83
4:05PM
0.32
4:31AM
0.79
4:50PM
0.36
5:07AM
0.73
5:36PM
0.39
5:41AM
0.66
6:23PM
0.42
6:13AM
0.57
7:14PM
0.45
Low Tide
/ height (m)
9:41AM
0.05
7:38PM
-0.07
10:15AM
0.02
8:29PM
-0.07
10:46AM
0.01
9:17PM
-0.05
11:15AM
0.01
10:03PM
-0.02
11:42AM
0.01
10:50PM
0.03
12:09PM
0.00
11:39PM
0.09
12:36PM
0.00
12:33AM
0.15
Friday
30
Saturday
31
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
Sunrise7:03--7:03--7:01--7:01--7:01--7:01--7:01--
Sunset-6:15--6:15--6:15--6:16--6:17--6:17--6:19-
clear
part cloud
rain showers
part cloud
rain showers
clear
clear
clear
clear
part cloud
part cloud
rain showers
rain showers
rain showers
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
--2-1------573-------
Temp. °C252523242423242423242524232322232422232423
Feels °C (?)262723262625252525232223252621202221242526
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

View detailed surf forecast for Grandma's at:
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Information about the Grandma's Surf forecast

The above surf forecast table for Grandma's provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Grandma's can be found by selecting the local surf guide option on the grey menu. Our Grandma's surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Grandma's) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Grandma's may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a vacation in Maui? If you are looking for accommodation near Grandma's, camping, hotels and condos and appartments in Maui, consider staying in Kihei which is 10 km (6 miles) away. Other places in and around Maui where you can find information about places to rent, and car hire include Wailuku which is 12 km (7 miles) away, Kahului, Lanai - Lanai and Kaunakakai - Molokai.

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