Punaluu in March: Black Sand, Sea Turtles, Weather and What to Do

In March, the morning light slides across the black sand at Punaluu and picks out the shapes of Hawaiian green sea turtles resting at the edge of the surf. Coconut palms rattle in the trade wind, and the smell of wet lava rock and salt hangs over the bay. On this part of the Big Island’s Kau coast, March stays peaceful, perfect for unhurried time on the sand, brief drives and a careful look at the untamed shore.

Black volcanic sand beach with coconut palms along Hawaii's south coast — Punaluu’s black sand meets the Pacific · Illustration

What is the weather like in Punaluu in March?

March in Punaluu is warm and mixed, with sunny stretches broken by passing showers, and it feels much like the weeks on either side of it.

Month	Average high (°F)	Average low (°F)	Rain days	Sea (°F)
February	79.9	64.9	4.2	76.4
March	79.6	65.8	4.6	75.9
April	80.4	67.1	3.6	76.2

Punaluu sits on the windward, wetter side of the island, so it gets more rain than the dry Kona coast but far less than Hilo. In March the rain tends to arrive as short showers pushed in by the trade wind, often in the evening or overnight, and a day of steady downpour is rare. Mornings are usually the clearest time, with soft light and a light breeze off the water.

Shorts and a swimsuit feel just right for the afternoon, while clouds often build over Mauna Loa’s slopes inland from the coast. Evenings stay mild, comfortable on a patio in a T-shirt, though a thin layer helps once the wind picks up after dark. Daylight lasts a little over twelve hours in mid-March, which leaves room for a full day outdoors.

Dress for sun and showers together: a light rain shell stays in the daypack, and quick-drying clothes beat cotton. The sea sits in the mid-70s, a touch cooler than in the weeks of late winter, but still pleasant once you are in.

Can you swim in Punaluu in March?

The water is warm enough for a short swim or a dip to cool off, though most people come to Punaluu to watch the shore rather than to spend hours in the sea.

The bay is open to the ocean and the black sand beach faces the swells that roll up the Kau coast. In March the surf is often lively and the shore break can be strong, with currents near the rocks. Conditions change from day to day, so look at the beach signs, follow any lifeguard’s advice, and stay out when the waves look rough.

There is a small sheltered corner near the boat ramp where the water is often quieter, and it suits wading and a gentle dip better than distance swimming. Snorkelers and surfers have better choices elsewhere on the island, and nervous swimmers or families with small children may prefer to stay at the water’s edge. Bring water shoes for the rocky entries, a towel for the wet sand, and a mineral sunscreen for the hours in the open sun.

Green sea turtles resting on black volcanic sand at Punaluu Beach — Honu haul out on Punaluu’s black sand · Illustration

What to do in Punaluu in March

March here is about the shoreline, the turtles and the slow rhythm of the south coast. The big events of the month, such as the hula competitions in Hilo the week after Easter in some years, lie a long drive away, so Punaluu itself stays calm and uncrowded, a place for walking, looking and picnicking.

Punaluu Black Sand Beach and the turtles

When lava hit the ocean it broke apart, and that is where this black sand comes from, which feels rough, warm on your feet and sparkly in the sunlight. Hawaiian green sea turtles, honu, often haul out on the sand to rest, and you may see several lined up near the rocks. They are protected, so keep your distance and never touch or crowd them, and watch from where the beach signs allow.

Early morning and late afternoon are the best times, when the light is low and the tour buses are gone. Coconut palms behind the beach give shade for a picnic, and the lava shoreline is good for photographs. It suits nearly everyone, from children to grandparents, as long as they stay out of the surf when it is rough.

Walking the coast and the old harbor

A short walk along the shore takes you across black lava rock, tide pools and the stone remains of an old landing. The ground is sharp and uneven, so sturdy sandals or sneakers matter. Look for waves breaking through lava channels, for sea birds on the rocks and for the freshwater seeps that feed the bay.

Respect the place: much of this coast is culturally important to Native Hawaiians, so stay off any stacked stones and walls, and keep off the living reef. The walk is best in the cooler morning, before the sun heats the dark rock.

Driving the Kau coast

Punaluu is a stop on the road between Volcanoes National Park and Kona, so many visitors pair it with a day of lava landscapes. The highway crosses open ranchland and dry lava fields, with long views down to the ocean. Fill the tank and pack snacks, because services between towns are few.

In March the weather on the slopes can change quickly, with mist higher up and sun along the shore. A rain jacket in the car solves most problems, and a picnic from a roadside fruit stand or a small town bakery is a pleasant way to break the drive.

For food, expect simple local fare: plate lunches, fresh fish, poke, malasadas and local coffee from the Kau district, all easy to find in the small towns near the highway rather than right on the beach. Bring water and snacks to the shore itself.

A two-day itinerary for Punaluu in March

Midday is for shade, a picnic under the palms and a short wade in the quieter corner by the boat ramp. In the afternoon, drive the coast road for lookouts over the lava cliffs, then return for the low evening light, with sunset in mid-March coming a little after six.

Day 2 heads inland and uphill. Spend the morning in the cooler air of the Kau highlands, among coffee farms and ranch country, and stop at a farm stand for lunch. If rain sets in, a farm tasting room or a café is a good place to wait it out.

In the afternoon, drive on to Volcanoes National Park for crater overlooks and steam vents, and finish with dinner in a small town restaurant, where plate lunches and fresh fish are the usual choices. Bring a warm layer, since the park is cool and often wet.

Is Punaluu busy in March?

Punaluu is moderately busy in March, with a steady flow of day visitors but little crowding outside the hours when tour groups stop.

Mainland spring breaks bring families to the Big Island through the month, and the busiest weeks are those around school breaks and Easter, whenever it falls. Most visitors stay on the Kona or Hilo sides and drive down for the day, so the beach is busiest late morning and early afternoon, and calmer at the start and end of the day.

Lodging close to Volcanoes National Park and throughout the Kau district is scarce, so reserve ahead of time for the holiday weeks and somewhat later for the quiet ones. Rental cars are in higher demand around spring break, so reserve ahead. Restaurant tables in the small towns rarely need much notice, though the few popular places fill at dinner.

What to pack for Punaluu in March

Pack for sun, wind, rain and sharp lava rock, with a layer for the cooler highlands.

A light rain jacket, since showers pass through often
Water shoes or sturdy sandals for the rocky shore
Mineral sunscreen and a hat for the open beach
A fleece or sweater for the park and the evening wind
A refillable water bottle for long drives
A small towel for wet sand and tide pools

Good to know before you go

March falls outside the official hurricane season, which runs from June 1 to November 30. The roads are the main thing to plan around: distances on the Big Island are long, services between towns are few, and a full tank and some snacks make the day easier. Lodging in Hawaii carries taxes on top of the room rate.

Fee	Amount	Who pays
State Transient Accommodations Tax	11.00%	Guests of hotels and rentals
County of Hawaii Transient Accommodations Tax	3%	Guests of hotels and rentals in the county

Punaluu in March vs February and April

Going a month earlier brings a slightly warmer sea and a similar mix of showers, with the winter whale season still in progress off the island’s coasts. February can be a touch wetter, and the Presidents’ Day week adds visitors.

A month later, April is a little warmer and drier, with fewer rain days, and the sea stays about the same. Easter and spring break weeks can bring more visitors, and the whales begin to leave as the month goes on.

If you want the driest weather, April is the better bet, while February suits whale watchers. March sits between them, with turtles, mild days and calmer beaches, and it is a good choice for travelers with flexible dates.

Is March a good time to visit Punaluu?

For travelers drawn to peaceful coasts, wildlife and slow days instead of resort extras, March works well.

It suits photographers, families with older children, road-trippers pairing the coast with Volcanoes National Park, and anyone who likes watching turtles. Those who want guaranteed sun or nightlife will be happier on the Kona side, since the sea here is often rough and conditions change from day to day and beach to beach.

The moment you get there, head for the beach, in the early morning or the late afternoon, and keep a respectful distance while you watch the turtles. The black sand, the palms and the rhythm of the surf are what make March here memorable.

Sources

NOAA NCEI, monthly normals 1991-2020, station USC00518600, 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 Hawaii, Department of Finance, Transient Accommodations Tax (TAT) page, hawaiicounty.gov/departments/finance/transient-accommodations-tax-tat (live returned HTTP 403 on request, read via Internet Archive Wayback Machine snapshot dated August 14, 2026, same official content), 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 USW00021510
NOAA NCEI, monthly normals 1991-2020, station USW00021504
NWS Honolulu / Central Pacific Hurricane Center, « 2026 Central Pacific Hurricane Season Outlook », weather.gov/hfo/hurricaneOutlook2026, checked September 24, 2026