Shortboard, Longboard
Best for
Beginner to Intermediate
Skill Level
Swell, Ocean
Spot Type
Moderate
Crowd Level

This spot information is AI-assisted and has not been human verified. It may be incomplete, outdated, or incorrect. Verify safety, access, local rules, and current conditions with official or local sources before riding.

About this spot

About

Grandma’s is a small reef break on Maui’s west side known for producing gentle, rolling surf with both left- and right-hand waves. Reports describe it as relatively exposed yet fairly consistent, making it a common choice for relaxed sessions—especially on the longboard end. Across sources, conditions are described as strongly tied to swell: summer south swells are the standout window, and an optimal swell direction is listed as S/SW (with the spot also described as working best in summer). Mid tide is repeatedly referenced as the preferred timing, and typical surf is described as small (around 2–3 feet), with the caveat that very large south swells can become more difficult and prone to closing out. Safety is a major theme for this reef area. The water is shallow over the reef, particularly at low tide, and fire coral is reported nearby—touching it can cause painful stings. Sharks are also repeatedly mentioned for Olowalu, with specific guidance to avoid surfing when the water is brown or murky (including avoiding dawn/dusk and after heavy rains). Crowds can build during summer swells and on weekends, and one source recommends aiming for smaller sets (under about 3 feet) and avoiding stormy conditions. There are no lifeguards reported at the spot, so using appropriate personal gear and staying cautious around the reef is strongly implied by the hazard notes.

  • Small, consistent reef waves with both-direction surf
  • Best performance with summer south swells
  • Mellow, peeling wave style suited to learning
  • Reef is shallow and requires careful attention
Great for
Surfing shortboardSurfing longboardBeginners
What's great
  • Consistent small surf that favors beginners and relaxed sessions.
  • Gentle, peeling waves with rides that can be long on the right swell.
  • Summer south swells are best for consistent conditions.
  • Campground proximity reported at/near the spot.
Heads up
  • Reef and shallow water hazards (especially at low tide).
  • Fire coral stings are possible.
  • Shark presence is reported for the area.
  • Crowds can occur.
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Practical spot guide

Wind, water and seasons

Wind

Direction
N, NNE, E
Offshore directions
N, NNE, NE
Wind Range
10–20 kts
Wind Type
Trade — Primarily swell-dependent for surfing; trade-wind regime around the area.
Reliability
Moderate; surfing is mainly reliant on swell.
Gust Factor
Light gusts — Gustiness described as generally light.
Best Months
May, June, July, August, September
Shadow Zones
West Maui Mountains can provide some shelter from stronger northeasterly trades.

Water & beach

Water Type
Swell, Ocean
Beach
Mixed — Mixed sand/rocks at access; reef environment.
Beach Size
Small
Waves
Small — Small waves reported around 2–3 feet; also described as small overall.
Launch
Small — A narrow strip of sand and rocks along the highway with several entry points through the reef; described access via small turnouts along the road.
Launch Difficulty
Moderate — Narrow entry/reef access; multiple entry points through the reef are mentioned.

Through the year

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Best seasonOff-season
24–28 °C
Water Temperature
20–31 °C
Air Temperature
Wetsuit Guide
Jan–Dec: rash-guard to thin top
Crowds by Season

Regularly crowded during summer swells and on weekends.

Storm/Rain Season

Winter months (November to March) see more frequent rain and occasional storms.

By sport

What to expect for each.

SurfingBest for this spotSkill Level

An exposed reef break with fairly consistent surf producing small, gentle, rolling waves suitable for both left- and right-hand waves. Best when south swells arrive; on very large south swells it can become difficult to manage and more prone to closing out.

Reef break
Wave Direction
Both
Optimal Swell
S, SW, SSE
Swell Height
0.5–2 m
Optimal Tide
Mid — Mid tide is listed as optimal.
Shelter
Semi-sheltered — Described as exposed overall, with some sheltering effects depending on conditions.
Wind Effect
Offshore winds from the north and east help groom the faces; southerly winds can make it choppy. (Separate source also describes offshore wind from the northeast.)
Bigger Swell
Can become difficult to manage and prone to closing out on very large south swells.
Wave Quality
Good — Generally good quality on the right swell and wind.
Wave Power
Soft — Gentle, rolling waves.
Wave Shape
Peeling — Longboard-leaning peeling waves.
Peel Speed
Slow — Mellow pace.
Ride Length
Medium — Rides can be long on a good south swell.
Ride Length Details
On a good south swell, rides reported around 50 to 100 meters.
Forecast

Check the forecast before you go

See wind, waves, weather and session windows for Grandma's in the full forecast view.

Grandma's wind and wave forecast summary

Wind
3–10 ktsGusts 20 kts
Direction
NE34°
Strongest day
Sat, Oct 2410 kts
Windy days
0/712 kts or more
Waves
0.6–1.1 m10s period
Temperature
22–29 °C

Over the next 7 days, Grandma's is forecast for daytime winds of 3–10 kts, peaking around 10 kts on Saturday, October 24 with gusts to 20 kts. The prevailing direction is NE. Waves run 0.6–1.1 m with a period of about 10s. Based on the Wavind model, in the spot’s local time.

Nearby

Other spots in the area

Safety

What to know before you launch

Safety, access, restrictions, rescue, and local rules can change. Treat these details as informational and confirm them locally before launching.

Hazards

  • Shallow reef
  • Reef
  • Fire coral
  • Sharks
  • Crowds
Ability Level: Beginner to Intermediate
Recommended Safety Gear
LeashWetsuit

Rescue & support

Lifeguard
None — No lifeguards reported at the spot.
Localism / Vibe
None — Localism described as none.

Rules of the spot

Standard surfing etiquette applies; be mindful of surf schools and beginners in the lineup.

Local Tips
  • Avoid surfing when the water is brown or murky (shark breeding area risk).
  • Be careful of fire coral; painful stings can occur if touched.
  • Try to surf waves under 3 feet.
  • Avoid surfing in stormy conditions.
  • Avoid crowded spots.
  • Avoid surfing at dawn, dusk, or after heavy rains when the water is murky.
  • The reef is especially shallow at low tide.

Getting there & access

Nearest City
Lahaina
Nearest Town
Olowalu
Parking
Park in the area about half a mile from the tunnel near Ukuhuname Park; limited roadside parking in dirt pull-offs are also noted.
Access
Head south from Lahaina on Honoapiilani Highway; look for Ukuhuname (Ukamehame) Park. Park about half a mile from the tunnel. The spot is the first turn on the left after the tunnel, between mile markers 11 and 11.5. Another description places access near Mile Marker 14 via small turnouts along the road.
Cost Level
Moderate
Local Language
English
Amenities

What's on the beach

Camping
Accommodation
Nearby town — Vacation rentals and hotels are located further north in Lahaina and Ka'anapali.
Food & Drink
A general store and a juice stand are located a short drive away in Olowalu.
Equipment Rental:
Rental shops are available in nearby Lahaina.
Learn, rent & more

Schools & services

No schools or services are listed for this spot yet.

The area

Off the water

Best time to visit: Summer months are best for consistent south swells.
Reviews

From riders who've been here

Community observations

Latest reported conditions

Spot questions

Frequently asked questions

When is the best season at Grandma's?

The best overall months at Grandma's are June, July, August, September. The best wind months are May, June, July, August, September.

Which wind directions work at Grandma's?

Grandma's works with N, NNE, E winds. Offshore directions are N, NNE, NE.

What skill level is Grandma's suitable for?

Grandma's suits these riding levels: Surfing: Beginner.