Open Water Swimming Pace Calculator

Explore the pace you need to hit to reach your open water swimming goal finish time.

Pick your distance and goal time to see the pace per 100 you need to hold, with a full split breakdown. Open water adds current, chop, and sighting, so treat the even model as a starting point and tap any split to set your own pace where the conditions change.

Select Your Distance & Goals

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The same pace from start to finish.

Open Water Swimming Race Summary

Pace / 100m
3:00
Pace / 100yd
2:45
Finish time
15:00
Distance
500 m

Edit Your Pacing

Splits

Edit pacing details below and your finish time & race summary will update accordingly.
MarkSplitPace / 100m
100 m3:000:03:00 elapsed
200 m3:000:06:00 elapsed
300 m3:000:09:00 elapsed
400 m3:000:12:00 elapsed
500 m · finish3:000:15:00 elapsed

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From Endurance Grid

About This Sport

Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.

Swimming events drop you into something that demands navigation, feel, and focus all at once. It's a sport that rewards the quietly competitive — the ones who do the work in the water before anyone's watching.

Read the Guide

Open Water Swimming

Open water races take place in lakes, rivers, bays, and oceans. Distances can run anywhere from a short 500m swim to 10K marathon events. Just you and the water.

Race Near You

Find a Open Water Swimming race near you

Enter a city or ZIP to see the closest upcoming open water swimming races to line up for.

Upcoming Open Water Swimming races

Aug
29
Sat
SwimmingTriathlonAquabike+2
Santa Barbara Triathlon & Beach Festival
1118 E Cabrillo Blvd., Santa Barbara, CA
5K · 500m · 1500m
Avg 78° / 60°·121 ft city elevation
Aug
30
Sun
Swimming
Swim of Legends
1550 S Lake Shore Dr., Lake Geneva, WI
10K
Avg 82° / 59°·1,001 ft city elevation
Aug
30
Sun
Swimming
4TH BOARDWALK MILE OPEN WATER SWIM
1 QUEEN ST or 1 GRENOBLE ST, Rehoboth Beach, DE
1500m
Avg 84° / 68°
Aug
30
Sun
Swimming
CEDAR ISLAND 5K SWIM
704 7th Street, Avalon, NJ
5K
Avg 85° / 62°·5 ft city elevation
Aug
30
Sun
Swimming
The Lighthouse Swim
Kingsland Point Park, Sleepy Hollow, NY
2 mi
Avg 82° / 61°
Aug
30
Sun
SwimmingDuathlonAquabike+3
2026 Cal Tri Charlottesville - 8.30.26
Fry's Spring Beach Club, Charlottesville, VA
Sprint
Avg 84° / 64°·480 ft city elevation
Aug
31
Mon
SwimmingPaddle
RTC Open Water Swim - Monday, 8/31/26
3800 James River Road, Midlothian, VA, VA
1500m
Avg 84° / 62°·288 ft city elevation
Aug
31
Mon
SwimmingPaddle
RTC Open Water Swim - Wednesday, 9/2/26
3800 James River Road, Midlothian, VA, VA
1500m
Avg 84° / 62°·288 ft city elevation
Sep–Oct
1–22
Tue–Thu
Swimming
Session 3 Swimming - OFP September - October 22
One Swim Club Way, Rockville, MD
Avg 82° / 65°·429 ft city elevation
Sep
5
Sat
SwimmingRunning
Cadillac YMCA Festival of Races
100 S Lake St, Cadillac, MI
1 Mile · 5K · 10K · Half Marathon · Marathon · 500m
Avg 74° / 51°·1,293 ft city elevation

Frequently Asked Questions

How do I calculate my swim pace?
Swim pace is measured per 100. Choose a distance and enter a goal time, and this calculator returns your pace per 100 meters and per 100 yards, along with a split for every 100m or 500m of the swim.
What is a good open water swim pace?
It depends on the swimmer and the water — current, chop, and temperature all change open water pace, and it usually runs slower than the same distance in a pool. Any pace that gets you to the finish is a valid goal; use the calculator to work backward from your target finish time.
What distances does this open water swimming pace calculator handle?
This open water swimming pace calculator can help you track pacing for any open water swimming distance. It will help you track your goal time, pace by split, and split time.