Grandma's Surf Break

Lat Long: 20.79° N 156.56° W

Grandma's Surf Forecast and Surf Report

Issued: 7 pm 30 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 31 Oct 2026:

  • Best quality surf: Sunday 1 Nov, 5AM (local time) - 2.5ft (0.8m), 19s period, NW swell with offshore 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, 2AM (local time) - 3.5ft (1.0m), 13s 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 2AM. The primary swell is predicted to be 1.0m and 13s period. The wind is predicted to be 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 offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Friday (Nov 06) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sat 31st Oct)3.5ft (1.0m) 13s
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

Mostly dry. Warm (max 26°C on Sat morning, min 23°C on Sun night). Winds increasing (calm on Sat morning, fresh winds from the NE by Mon morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Tue morning, min 23°C on Mon night). Winds decreasing (fresh winds from the NNE on Mon night, light winds from the NE by Wed night).

Saturday
31
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
2
3
1
2
0
0
0
0
0
0
1
1
1
1
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)
1
S
13
0.9
S
13
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
S
12
0.3
S
11
0.3
S
11
1.6
E
6
0.3
SSW
18
0.4
SW
18
0.5
NW
19
0.4
SSW
16
0.4
SSW
16
0.4
SSW
15
Wave Graph
Metric surfscale
Energy kJ
350
280
293
335
621
540
489
77
46
47
23
22
0
63
79
184
100
99
93
Wind (km/h)
15
NNE
5
WNW
10
NNE
10
NNE
15
NNE
25
NNE
25
NNE
25
NNE
30
NNE
25
NE
20
NNE
20
NE
15
NNE
15
NE
20
NE
10
NNE
10
NE
10
NNE
10
N
Wind State
off
glassy
cross-off
cross-off
off
cross-off
off
off
off
off
off
off
off
off
off
cross-off
off
off
cross-off
High Tide
8:02PM0.25m
8:36AM0.77m
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
Low Tide
00:41AM0.09m
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
part cloud
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part cloud
part cloud
part cloud
clear
part cloud
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part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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6:28
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6:28
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6:28
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6:28
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6:30
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—
6:30
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
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5:51
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—
5:50
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—
5:50
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—
5:49
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—
5:49
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5:47
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 mm
—
—
—
—
—
—
—
—
—
—
—
—
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—
—
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Temp °C
25
26
26
25
26
26
24
25
25
23
26
26
24
26
26
24
26
26
25
Feels °C
27
29
29
28
27
25
23
23
23
20
24
25
23
26
26
24
28
28
27
  • 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
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Quick surf report for Grandma's:

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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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