Grandma's Surf Break

Lat Long: 20.79° N 156.56° W

Grandma's Surf Forecast and Surf Report

Issued: 1 pm 31 Oct 2026 (local time)

Forecast update in  hr  min

Today's Grandma's sea temperature is
27.0°C
0.6° 

Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Grandma's surf forecast from 1 Nov 2026:

  • Best quality surf: Sunday 1 Nov, 5AM (local time) - 2.5ft (0.8m), 19s period, NW swell with glassy winds.
  • Most powerful swell: Sunday 1 Nov, 11AM (local time) - 3.5ft (1.0m), 18s period, NW swell with 621 kJ wave energy.
  • Next surfable swell (1★+): Saturday 31 Oct, 8PM (local time) - 2.5ft (0.8m), 14s period with S swell.

Best Forecast Surf Conditions for Grandma's this week:

The surf forecast for Grandma's over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Oct 31) at 8PM. The primary swell is predicted to be 0.8m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Grandma's in the next 16 days are 1.0m 18s and forecast to arrive on Sunday (Nov 01) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Thursday (Nov 05) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sat 31st Oct)2.5ft (0.8m) 14s
Best Surf 5AM (Sun 1st Nov)2.5ft (0.8m) 19s
Most Powerful11AM (Sun 1st Nov)3.5ft (1.0m) 18s

Table - best surf conditions forecast for Grandma's over the next 16 days.


Short Range Forecast

Light rain (total 4mm), mostly falling on Sat afternoon. Warm (max 27°C on Sat afternoon, min 22°C on Mon night). Winds increasing (calm on Sun morning, fresh winds from the NE by Mon morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Wed morning, min 23°C on Tue night). Wind will be generally light.

Sat
31
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
3
3
2
0
0
1
0
0
0
1
1
1
1
1
1
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
S
14
0.6
NW
20
1
NW
18
1
NW
17
1
NW
16
0.5
S
12
0.4
S
12
0.4
SSW
13
0.3
S
11
0.3
S
11
0.3
SE
6
0.3
SSW
18
0.4
SW
18
0.3
SSW
17
0.4
SSW
16
0.4
SW
16
0.4
SSW
15
0.9
NW
14
0.4
SSW
15
0.4
SSW
15
Wave Graph
Metric surfscale
Energy kJ
293
335
621
540
489
76
46
54
23
22
5
63
79
56
100
65
92
305
93
72
Wind (km/h)
5
N
0
NW
10
N
25
NNE
30
NNE
30
NNE
25
NNE
20
NE
15
NNE
15
NE
15
NNE
20
NE
20
NE
15
NNE
5
NNE
10
ENE
10
NNE
5
NNE
10
NNE
20
NNE
Wind State
glassy
glassy
cross-off
off
off
off
off
off
off
off
cross-off
off
off
off
glassy
off
off
cross-off
off
off
High Tide
9:34PM0.28m
9:40AM0.73m
10:53PM0.34m
10:40AM0.69m
11:56PM0.42m
11:36AM0.64m
00:47AM0.51m
12:26PM0.59m
1:32AM0.59m
1:11PM0.53m
2:13AM0.66m
1:53PM0.47m
2:51AM0.72m
Low Tide
4:11PM0.12m
1:53AM0.14m
5:04PM0.09m
3:18AM0.18m
5:46PM0.07m
4:47AM0.20m
6:19PM0.05m
6:08AM0.20m
6:49PM0.03m
7:18AM0.19m
7:16PM0.02m
8:19AM0.17m
7:43PM0.00m
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
6:28
—
—
6:28
—
—
6:28
—
—
6:30
—
—
6:30
—
—
6:31
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
—
—
5:50
—
—
5:50
—
—
5:49
—
—
5:49
—
—
5:47
—
—
5:47
—
 mm
2
—
1
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
27
26
26
26
24
25
26
23
26
26
24
27
27
25
27
27
25
27
27
25
Feels °C
31
29
29
26
23
22
24
20
26
25
23
27
29
25
29
29
27
29
29
26
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
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Quick surf report for Grandma's:

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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.


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 16 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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