Is it safe to swim at Lydgate Beach Park?

Lydgate Beach Park has a Moderate-Low bacteria risk rating (2 out of 5). The protected rock-walled swimming ponds provide calmer water than the open coast. However, the nearby Wailua River mouth can bring runoff after rain. During dry weather, conditions are generally good. Always check DOH advisories before swimming.

What affects water quality at Lydgate Beach?

The main factor is the nearby Wailua River mouth, which can bring freshwater runoff and elevated bacteria levels after rain. The east side of Kauai receives moderate rainfall. The rock-walled swimming ponds help buffer against open ocean swells but may trap runoff water during storms.

Is Lydgate Beach good for kids?

Lydgate Beach Park is one of the best family-friendly beaches on Kauai. The two rock-walled swimming ponds create protected areas with calm water, making it ideal for young children and beginning swimmers. The larger pond is great for snorkeling. There are also lifeguards, restrooms, showers, and a large playground nearby.

What is the difference between the swimming ponds and the open ocean at Lydgate?

The swimming ponds at Lydgate are enclosed by rock walls that block most wave action, creating calm, protected water. The open ocean outside the ponds can have strong currents and surf. For water quality, the ponds can sometimes trap runoff after rain, while the open ocean flushes more quickly. During dry weather, both areas are generally clean.

When is the best time to swim at Lydgate Beach?

The best time to swim at Lydgate Beach is during dry weather when there has been no significant rain for at least 72 hours. The swimming ponds are enjoyable year-round in terms of wave protection. Avoid swimming after heavy rain when the Wailua River can push runoff into the area.

← All beaches & hotels

KAUAI · EAST SIDE

Lydgate Beach Park

Water quality status and bacteria risk rating

📍 East side Kauaʻi near Wailua, about 10 min from Lihue

Checking live advisories…

30-Day Water Quality History

30/30 days advisory-free · no DOH advisories posted in the past 30 days

Jul 14 today (Aug 13)

EPA recreational threshold: 130 CFU/100mL enterococcus

Trend: — stable

advisory-free Brown Water Advisory Beach Advisory (bacteria)

Historical Pattern · 3-year monthly

Historically most advisory-free in January (100% advisory-free) and most advisoried in April (54% advisory-free). Current 30-day window is tracking about average for August.

Community Testing · Surfrider BWTF

Lydgate (Kamalani Bridge)

Last sample 2026-02-14 · view full report →

41 MPN/100mL

within threshold

Lydgate (Morgans Pond)

Last sample 2026-07-12 · view full report →

10 MPN/100mL

within threshold

About: Volunteer water-quality monitoring by the Surfrider Foundation's Blue Water Task Force. Method: IDEXX Enterolert (MPN/100mL). Threshold: 130 MPN/100mL Beach Action Value — matches Hawaii DOH. Sampling: monthly (Kauaʻi/Maui), biweekly (Oʻahu).

Source: Hawaii DOH Clean Water Branch · Updated 2026-08-13

⚠

If It Looks Brown, Don't Swim

Never enter the ocean when the water appears brown or murky, even if no advisory is posted. Hawaii is often slow to test beaches and update advisories — not every beach is monitored. After heavy rain, wait at least 72 hours and until the water clears before swimming.

Learn more about brown water advisories →

Historical Bacteria Risk

⚠ Historical rating — this is based on long-term testing data, not current conditions. The state of Hawaii is often slow to test beaches and update advisories. Always check the water yourself and avoid brown or murky water.

Moderate-Low Risk 2 / 5

Lydgate Beach Park has historically baseline water quality. The protected rock-walled swimming ponds provide calmer water than the open coast and are a favorite for families with young children. The nearby Wailua River mouth can bring freshwater runoff after rain, which is the main water quality concern.

During dry weather, water quality in the swimming ponds is typically good. After storms, the Wailua River can discharge sediment and bacteria into the area. The ponds may also trap some runoff water. Lydgate is one of the most popular family beaches on Kauaʻi, with lifeguards, restrooms, and a large playground.

Based on: DOH monitoring data, Wailua River proximity, protected pond design, east side rainfall patterns

⚠️ The 72-Hour Rain Rule

The Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. At Lydgate Beach, the Wailua River can push runoff into the swimming area after storms. The protected ponds may take longer to flush than open coast beaches. Wait for the water to clear before swimming.

Lydgate Beach Area Hotels — Historical Beach Water Quality

🏨 Hilton Garden Inn Kauaʻi

Wailua, walking distance to Lydgate

Low-Mod

🏨 Kauaʻi Shores Hotel

Kapaʻa, 10 min drive north

Low-Mod

Book Tours & Activities

Top-rated experiences near this beach. Check water quality above, then plan your trip.

Wailua River Kayak

Kayak up the Wailua River to a secret waterfall

Viator

Kauai Zipline Tour

Zipline over Kauai's lush tropical valleys

Viator

Kauai ATV Tour

Off-road ATV adventure through Kauai's backcountry

Viator

🦈 Compare Tours & Prices

Browse top-rated Kauaʻi tours. Multiple operators, reviews, and instant confirmation.

GetYourGuide

Tours listed via Viator and GetYourGuide. Safe to Swim Hawaii may earn a commission if you book, at no extra cost to you.

Related Guides

Kalapaki Beach Water Quality

Nearby →

Poipu Beach Water Quality

Nearby →

Swimming After Rain in Hawaii

Guide →

Hawaii Brown Water Advisory Guide

Guide →

Is It Safe to Swim at Kauai Beach Resort?

Hotel →

Waipouli Beach Resort Water Quality Guide

Hotel →

Hanalei Bay Water Quality

Nearby →

Kauaʻi Beach Guide

Island → Hazards at Lydgate Beach Park — What to Know→ Kalapaki Vs Lydgate — Water Quality Compared→ Lydgate Vs Anini — Water Quality Compared→ Lydgate Vs Kalapaki — Water Quality Compared→ Lydgate Vs Salt Pond — Water Quality Compared→ Poipu Vs Lydgate — Water Quality Compared→ Wailua Vs Lydgate — Water Quality Compared→

Lydgate Beach Park Water Quality by Month

January February March April May June July August September October November December

Get Beach Safety Alerts

Free alerts when water quality changes at your beach — brown water advisories, bacteria warnings, and all-clear notices.

No spam. Just safety alerts for your trip.

Check all Hawaii beaches & hotels →

100+ beaches and 25+ hotels across all 6 islands

⚠️ Important Disclaimer

Safe to Swim Hawaii is an independent passion project — it is not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings on this site are estimates based on publicly available testing data and geographic analysis. They are not real-time measurements and may not reflect current conditions. “No DOH Alerts” means no advisory is currently posted — it does not mean the water was tested and found safe. DOH only monitors a fraction of Hawaii’s beaches, and some areas have no regular testing at all.

Always verify current water quality conditions with the Hawaii Department of Health Clean Water Branch before entering the water. This site is for informational purposes only and should not be the sole basis for any swimming decisions.

This site is a work in progress and we want to make it better. If you notice something that isn't working right, have a suggestion, or want to share local knowledge about a beach, please reach out.

This site does not recommend or advise anyone to swim at any beach. We share government data and geographic analysis so you can make your own informed decisions. By using this site you accept full responsibility for your own safety. See our Terms of Use for full details.

When in doubt, don't go out. 🤙