On an August morning in Princeville, the trade winds rustle the plumeria and the ironwood trees along the golf course, and the green wall of the Namolokama mountains behind Hanalei shows itself for a while before the clouds roll in. Surfboards ride on car roofs headed to the bay, and the farm stands along the Kuhio Highway set out their fruit. August on Kauai’s north shore is warm, lush and unhurried, a month for swimming, waterfall views and long evenings on a lanai.
What is the weather like in Princeville in August?
August in Princeville is warm and green, with sunny stretches broken by passing showers, because the north shore catches rain from the trade winds all year.
| Month | Average high (°F) | Average low (°F) | Rain days | Sea (°F) |
|---|---|---|---|---|
| July | 84.8 | 69.3 | 14.8 | 79.6 |
| August | 85.9 | 69.5 | 14.7 | 80.2 |
| September | 84.6 | 69.7 | 12.6 | 80.7 |
Most days, the morning is the finest stretch. The air is soft, the light is clear, and the mountains are often visible before clouds gather over the ridges. Afternoons turn warm and a little humid, and a shower can sweep through, wet the lawns and move on within a short time. A day that stays gray from start to finish is the exception in summer.
Princeville sits on the windward, wetter side of the island, so it gets noticeably more rain than the sunny south and west shores. August is still the drier half of the year here, and showers tend to be quick rather than all-day soakers.
Heavy downpours of an inch or more are rare in a typical August. If you want guaranteed sun, Poipu on the dry side is a short drive away, but many visitors find the showers part of the charm.
In August, you can eat dinner outdoors in a T-shirt most nights, though you might want something light for when the wind rises. Pack a thin rain jacket and quick-drying clothes rather than anything heavy. Daylight lasts nearly thirteen hours in mid-August, which leaves a long window for beaches and trails, and sunsets over the bay come on gently.
Can you swim in Princeville in August?
Yes, the sea is warm enough in August for long swims and relaxed snorkeling sessions without a wetsuit.
Summer is the calmer season on Kauai’s north shore. The big winter swells that make Hanalei and the beaches below Princeville famous with surfers usually fade by now, and the bays are often gentler.
Anini Beach, shielded by a long offshore reef, is a favorite for families and for those who like to float and look for fish. Hanalei Bay is wide and sandy, with gentle waves for learning to surf or paddle a board, and tidepools near Queen’s Bath and along the coast draw curious wanderers.
Calm is never a promise. Currents, shore break and surprise sets can appear on any north shore beach, even in summer, and the reef and lava rock edges are sharp.
Look for the lifeguard towers, read the beach signs, and follow the flags before you go in. Pack a rash guard for sun protection, water shoes for rocky entries, and mineral sunscreen, and stay a respectful distance from any sea turtles or monk seals that are resting on the sand.
What to do in Princeville in August
August here is about the outdoors: beach mornings, green valleys, and slow dinners as the light fades. There is no single big festival that defines the month on the north shore, so the pleasure comes from the island itself, from farm stands stacked with fruit to the rhythm of paddlers and surfers heading into Hanalei Bay.
Summer weekends often bring local gatherings in and around Hanalei, from farmers markets to community events and music at open-air venues. Plate lunches, shave ice and fresh poke show up at roadside stands and small shops, and the taro fields of the Hanalei valley glow a deep green. Fruit stands and market stalls carry whatever is ripe, so ask what came in that morning.
Hanalei Bay and town
From Princeville, a short trip down the hill delivers you to Hanalei, where the road drops toward the bay beyond taro fields and bridges with just one lane. The curved beach stretches for a long way, with the mountains rising behind it, and the old pier is a good place for an early walk when the water is flat and the light is gentle.
In town you will find a small cluster of shops, galleries, coffee stops and food trucks. Come in the morning for a quiet stroll and again after a swim for lunch. On bright weekends the lots may get full, which is why arriving sooner helps, and a midday rain gives you a fine reason to slip into a café or shop.
Anini Beach and the quiet side of Princeville
Anini Beach lies on the east side of Princeville and has a protected feel on many summer days, thanks to the long fringing reef. Families like the shallow shoreline, and paddleboarders and kite surfers share the stretch when the wind is up. A grassy park lines the sand, with shade trees where you can spread a picnic.
Even here, follow the signs and lifeguard guidance, because currents can run near channels in the reef. Bring your own snacks and water, and plan an early arrival if you want a quiet spot. It is a good choice for those who want a gentler first swim before trying Hanalei.
Waterfalls, trails and the Na Pali coast from afar
The north shore is full of green views. The Princeville area has short walks to lookouts over the bay, and farther along the highway you can see waterfalls and the cliffs that lead toward the Na Pali coast. Haena State Park, at the end of the road, requires reservations, and current rules are best confirmed on the state parks site before you go.
Summer is a more reliable season for hiking and coastal views than winter, though trails can be muddy after showers. Wear shoes with grip, carry water, and keep off the reef and away from any sacred stones or sites you pass. Even a short walk along the cliffs gives you a sense of the deep valleys and ridges that define the island.
Golf is another Princeville staple, with courses set along the bluffs and green slopes, and resort spas and pools make good rainy-hour refuges. Boat trips and kayak outings along the coast are also popular in summer when seas are often calmer, though conditions decide what runs on a given day.
A two-day itinerary for Princeville in August
Day 1 starts early with a walk on Hanalei Bay while the air is cool and the beach is nearly empty. Sunrise comes early in August, so there is plenty of light for a coffee and a stroll along the pier. Spend the late morning swimming or learning to paddleboard, then eat lunch at a food truck or a casual café in town, where plate lunches and fish tacos are easy choices.
In the afternoon, when showers are more likely, browse Hanalei’s shops and galleries or take a slow drive to the lookouts for views of the valley. Return to Princeville for a late afternoon rest at the pool. For dinner, pick a restaurant with a view and stay for the sunset glow over the bay. If the weather turns, a spa session or a long meal indoors fills the hours nicely.
Day 2 begins at Anini Beach, which is quieter in the morning and suits an unhurried swim or a snorkel in the shallows. Bring a picnic and water, and stay until the sun climbs high and the shade trees become more inviting than the sand. Watch the flags, and stay close to shore if you are unsure of the currents.
Spend the afternoon on a coastal walk or a round of golf on one of the bluff courses, or choose a boat or kayak outing if conditions allow. Cap the day with an early dinner at a farm-to-table spot or a casual grill, and linger over dessert as the light fades. For a wet day, plan galleries, a long lunch and a slow afternoon at your lodging.
Is Princeville busy in August?
Yes, August is fairly busy in Princeville, because it is summer vacation season and families fill the north shore.
School breaks bring mainland families and local residents to the beaches, and the weeks before school starts can feel livelier than the rest of the month. Hanalei’s parking areas and popular restaurants fill earlier, especially on weekends, and rental cars and rooms are easier to secure if you book ahead. It is a good habit to reserve lodging and cars early for the heart of summer, and a bit later for the quieter weeks near the end of the month.
Restaurant tables at dinner are worth reserving, particularly for sunset seatings. Mornings at the beach remain calm, and the trails away from the main road stay quiet. Haena State Park is a place where reservations matter, so check the state parks site for the current rules before planning a visit there, and look at the state parks notices page for any updates after Hurricane Lowell in September 2026.
What to pack for Princeville in August
Pack light, quick-drying clothes and a few items for the sun and the showers.
- A light rain jacket, for the passing showers that come off the mountains.
- Water shoes, for rocky entries and slick stones near the shore.
- For plenty of time spent in the ocean and under the sun, pack a rash guard and mineral sunscreen.
- Shoes with grip, for muddy trails after rain.
- A dry bag, to keep phones and cameras safe on the beach or boat.
- Pack a light sweater for when the lanai gets breezy in the evening.
Good to know before you go
August falls inside the Central Pacific hurricane season, which runs from June 1 to November 30. Hawaii is rarely hit, but it is wise to stay flexible and follow local weather updates. The north shore is a small, quiet area with a single main road, so plan on a rental car and allow extra time on busy weekends. Book the things that need reservations first, then fill in meals and outings.
| Fee | Amount | Who pays |
|---|---|---|
| State Transient Accommodations Tax | 11.00% | Guests of hotels and short-term rentals |
| Kauai County Transient Accommodations Tax | 3% | Guests of hotels and short-term rentals |
Princeville in August vs July and September
Moving the trip to July changes little in the weather, since the air and sea are nearly the same, and the crowds are similar with school out. July has a slightly cooler sea and a touch less sun in the averages, but it feels much like August. Choose July if your calendar leaves you no choice, and you will find the same green hillsides and beach days.
September brings a slightly warmer sea and fewer rainy days, and the summer families thin out once school is back in session. Rooms and restaurant tables often become easier to find, and the beaches feel more relaxed. The trade-off is that the month sits deeper into the hurricane season, so flexibility matters a little more.
Families tied to school calendars will likely stay with July or August, while flexible travelers who prefer quieter beaches may enjoy September. If you want the liveliest summer mood on the north shore, August is the middle of it.
Is August a good time to visit Princeville?
Yes, August is a good time to visit Princeville for beach lovers, families and anyone who enjoys a warm sea and green mountains.
Swimmers, paddlers and casual hikers will be happiest, since summer tends to bring calmer water than winter and long daylight for outings. Travelers who dislike an occasional shower, or who want guaranteed sun every hour, may prefer the dry south and west shores of the island, where the clouds hang back. Surfers hunting big waves are better served in winter.
On arrival, start with a morning on Hanalei Bay or Anini Beach, when the light is soft and the sand is quiet, and sort out any reservations for parks or boat outings afterward. August in Princeville feels like the north shore at its easiest: warm water, green ridges above the bay, and evenings that end with the last light on the water.
Sources
- NOAA NCEI, monthly normals 1991-2020, station USC00518165, checked September 8, 2026
- Open-Meteo Marine API, average 2015-2024, checked September 8, 2026
- sunrise-sunset.org, sunrise and sunset calculated for the 15th of the month, checked September 8, 2026
- Hawaii Department of Taxation, Tax Announcement No. 2025-03 (Transient Accommodations Tax Law Changes from 2025 Legislative Session), files.hawaii.gov/tax/news/announce/ann25-03.pdf, checked September 24, 2026
- County of Kauai, Department of Finance, Transient Accommodations Tax page, kauai.gov/Government/Departments-Agencies/Finance/Transient-Accommodations-Tax, checked September 25, 2026
- Hawaii Department of Taxation, County Surcharge on General Excise and Use Tax page, tax.hawaii.gov/geninfo/countysurcharge/, checked September 25, 2026
- NOAA NCEI, monthly normals 1991-2020, station USW00022536
- NWS Honolulu / Central Pacific Hurricane Center, « 2026 Central Pacific Hurricane Season Outlook », weather.gov/hfo/hurricaneOutlook2026, checked September 24, 2026
To plan your stay
- Best Time to Visit Princeville: Weather by Month, Surf, Crowds and Yearly Events
- Princeville in July: Weather, Summer Swimming and What to Do on Kauai's North Shore
- Princeville in September: Weather, North Shore Swimming and What to Do
- Princeville in June: Weather, Calm North Shore Swimming and What to Do