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.

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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 under DOH advisory · persistent issues

Apr 15 today (May 15)

1 Brown Water Advisory

Trend: — stable

clean Brown Water Advisory Beach Advisory (bacteria)

Historical Pattern · 3-year monthly

Historically cleanest in January (100% clean) and most advisoried in April (54% clean). Current 30-day window is tracking above typical May advisory frequency.

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 2026-05-09 · view full report →

246 MPN/100mL

exceeds BAV

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 2026-05-15

⚠

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

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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

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⚠️ 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.

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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. 🤙