In short
- Wear casual clothing and comfortable walking shoes.
- Bring a light rain jacket for frequent tropical showers.
- Pack reef-safe bug repellent for the rainforest path.
In this article
The Wailua River boat tour is a relaxed, 90-minute round-trip excursion. You do not need specialized hiking gear. The boat is open-air, and the short walk to the observation deck is flat and paved.
What should I wear to the Fern Grotto?
Wear light, casual layers and comfortable walking shoes.
Dress for warm, tropical weather. The river cruise takes 25 minutes each way on a spacious open-air boat. The walk from the dock to the grotto observation deck takes about 10 minutes on a flat surface.
Do I need hiking boots for the Wailua River cruise?
No, heavy hiking boots are not necessary.
The rainforest nature walk leading to the grotto is completely paved. Regular sneakers or supportive walking sandals work perfectly. Visitors must stay on the paved path at all times for safety.
How should I prepare for the weather?
Bring a light rain jacket or poncho.
Brief tropical showers are frequent on Kauai's east side. April through September offers calmer weather, but rain is possible year-round. An easy-to-pack rain layer keeps you dry on the open-air boat deck.
Do I need bug spray at the Fern Grotto?
Yes, mosquitoes are common in the surrounding jungle.
Apply reef-safe bug repellent before you leave the boat. The paved path takes you through thick tropical flora, including hanging ferns and ginger, where insects are active.
What else should I pack for the boat tour?
Bring sun protection, a camera, and a reusable water bottle.
Pack a hat, sunglasses, and sunscreen for the 2-mile cruise upstream. A smartphone or camera is useful for photographing Mount Waiʻaleʻale and the traditional Hawaiian musicians. Do not bring alcohol, as it is strictly prohibited.
Do I need to bring money or a credit card?
Bring a credit card if you drive to the marina independently.
Wailua River State Park charges non-Hawaii residents a $10 parking fee per vehicle. There is also a $5 per person entry fee. Both fees require a credit card. Tour packages often cover these costs.
Questions travellers ask
How long is the Fern Grotto boat tour?
The standard Smith's riverboat tour takes 90 minutes round-trip. This includes the boat ride, live entertainment, and the short guided walk to the observation deck.
Are pets allowed on the boat?
No. Pets are not permitted on the riverboats or anywhere on the State Park trails.
Should I pack a lunch for the cruise?
You do not need a full meal for the 90-minute cruise. Food is generally not provided on standard boat tours. Bring a reusable water bottle to stay hydrated.
