WhenToBird

Progne subis · Hirundinidae

When Do Purple Martins Arrive in South Carolina?

Adult female Purple Martin
Photo: Ron Bondy, CC BY-SA 4.0 via iNaturalist

Purple Martins reach South Carolina in early March, are common by mid March, peak in late June (11% of checklists), and most are gone by the second week of August.

When to look

First arrivalsMar 1-7early March
Common byMar 15-21mid March
PeakJun 22-30late June
Most gone byAug 8-14the second week of August

Best: late June. First arrivals early March; most are gone by the second week of August. Peak: on about 11% of South Carolina checklists.

  1. Jannot usually seen
  2. Febrare
  3. Maruncommon
  4. Aprcommon
  5. Maycommon
  6. Junpeak season
  7. Julpeak season
  8. Augcommon
  9. Seprare
  10. Octnot usually seen
  11. Novnot usually seen
  12. Decnot usually seen

Darker months: more checklists report it. Outlined: peak month.

0%5%10%15%Jan 1-7: 0% of 15487 checklistsJan 8-14: 0% of 11691 checklistsJan 15-21: 0% of 11994 checklistsJan 22-31: 0% of 16225 checklistsFeb 1-7: 0.1% of 12192 checklistsFeb 8-14: 0.1% of 14044 checklistsFeb 15-21: 0.3% of 18483 checklistsFeb 22-28: 1.0% of 12045 checklistsMar 1-7: 2.0% of 11511 checklistsMar 8-14: 3.1% of 11704 checklistsMar 15-21: 3.6% of 11526 checklistsMar 22-31: 4.1% of 17386 checklistsApr 1-7: 5.0% of 13148 checklistsApr 8-14: 5.0% of 13193 checklistsApr 15-21: 5.5% of 13936 checklistsApr 22-30: 5.7% of 19002 checklistsMay 1-7: 6.6% of 14133 checklistsMay 8-14: 7.6% of 13668 checklistsMay 15-21: 7.4% of 11064 checklistsMay 22-31: 7.6% of 14461 checklistsJun 1-7: 8.1% of 10231 checklistsJun 8-14: 8.9% of 9417 checklistsJun 15-21: 11% of 8012 checklistsJun 22-30: 12% of 9720 checklistsJul 1-7: 11% of 7907 checklistsJul 8-14: 9.3% of 7338 checklistsJul 15-21: 8.6% of 7312 checklistsJul 22-31: 7.3% of 10877 checklistsAug 1-7: 5.6% of 7816 checklistsAug 8-14: 4.3% of 7655 checklistsAug 15-21: 2.4% of 7797 checklistsAug 22-31: 1.5% of 11246 checklistsSep 1-7: 0.9% of 8956 checklistsSep 8-14: 0.7% of 8929 checklistsSep 15-21: 0.3% of 9389 checklistsSep 22-30: 0.2% of 13028 checklistsOct 1-7: 0.1% of 11063 checklistsOct 8-14: 0% of 10968 checklistsOct 15-21: 0% of 10264 checklistsOct 22-31: 0% of 12917 checklistsNov 1-7: 0% of 8802 checklistsNov 8-14: 0% of 8339 checklistsNov 15-21: 0% of 8798 checklistsNov 22-30: 0% of 12925 checklistsDec 1-7: 0% of 8541 checklistsDec 8-14: 0% of 8609 checklistsDec 15-21: 0% of 9961 checklistsDec 22-31: 0% of 17541 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Frequency is the share of complete checklists in South Carolina that listed the bird, 2016–2025. It is not a head count, and it follows where and when people go birding. How to read it.

JanFebMarAprMayJunJulAugSepOctNovDec
today
Second week of November

Each county is shaded by the share of complete checklists there that listed the bird, blended with the weeks either side. Darker is more often. It follows where people watch birds, not how many birds there are. How to read it.

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Where in South Carolina

Best counties

Share of checklists at the peak
  1. Williamsburg CountyBest late May · 47 checklists that week, 1,512 in all41%
  2. Clarendon CountyBest the second week of July · 126 checklists that week, 9,189 in all39%
  3. Marlboro CountyBest late July · 12 checklists that week, 686 in all37%
  4. Orangeburg CountyBest the second week of May · 217 checklists that week, 8,992 in all36%
  5. Fairfield CountyBest mid July · 18 checklists that week, 768 in all32%
  6. Lexington CountyBest late July · 528 checklists that week, 27,992 in all28%

Best spots

Share of checklists at the peak
  1. Cherrys CrossingPickens County, best early June · 21 checklists that week, 1,964 in all82%
  2. Hartwell LakeAnderson County, best late June · 28 checklists that week, 715 in all72%
  3. Litchfield SpitGeorgetown County, best the second week of July · 22 checklists that week, 227 in all62%
  4. Santee River Basin MegasiteCharleston County, best mid May · 22 checklists that week, 1,240 in all61%
  5. Fort Sumter and Fort Moultrie National Historical ParkCharleston County, best late June · 37 checklists that week, 3,372 in all61%
  6. Conestee ParkGreenville County, best early July · 114 checklists that week, 7,332 in all60%

Busy spots report more of everything; compare the checklist counts before you drive anywhere.

Best time of day

In South Carolina, the Purple Martin is most often listed on checklists started between 6 and 8 am (4.9% of those checklists).

0%2%4%6%8%12 am: too few checklists (222) to judge1 am: too few checklists (160) to judge2 am: too few checklists (132) to judge3 am: too few checklists (212) to judge4 am: too few checklists (267) to judge5 am: too few checklists (1898) to judge6 am: 7.2% of 19280 checklists7 am: 4.2% of 66492 checklists8 am: 3.3% of 73941 checklists9 am: 3.0% of 63039 checklists10 am: 2.5% of 52652 checklists11 am: 2.4% of 41908 checklists12 pm: 2.2% of 36782 checklists1 pm: 2.0% of 33300 checklists2 pm: 1.9% of 32248 checklists3 pm: 1.7% of 35451 checklists4 pm: 2.6% of 34410 checklists5 pm: 3.1% of 27073 checklists6 pm: 4.2% of 17375 checklists7 pm: too few checklists (10313) to judge8 pm: too few checklists (2756) to judge9 pm: too few checklists (672) to judge10 pm: too few checklists (412) to judge11 pm: too few checklists (256) to judge12a3a6a9a12p3p6p9p
Share of checklists started in each local hour that reported it. It reflects when people go birding as well as when birds are active. Grey hours have too few checklists (under 2% of the state’s, or under 200) to judge.
Week-by-week table
MonthDays 1-78-1415-2122-end
January0%0%0%0%
February0.1%0.1%0.3%1.0%
March2.0%3.1%3.6%4.1%
April5.0%5.0%5.5%5.7%
May6.6%7.6%7.4%7.6%
June8.1%8.9%11%12%
July11%9.3%8.6%7.3%
August5.6%4.3%2.4%1.5%
September0.9%0.7%0.3%0.2%
October0.1%0%0%0%
November0%0%0%0%
December0%0%0%0%

Neighboring states

  • North Carolina: arrives the second week of March, 1 week later than South Carolina
  • Georgia: arrives mid February, 2 weeks earlier than South Carolina
  • Tennessee: arrives early March, in the same week than South Carolina
  • Virginia: arrives late March, 3 weeks later than South Carolina

Common questions

When do Purple Martins arrive in South Carolina?
Purple Martins reach South Carolina in early March, are common by mid March, peak in late June (11% of checklists), and most are gone by the second week of August.
When do Purple Martins leave South Carolina?
Most Purple Martins have left South Carolina by the second week of August, when reports fall below half their usual rate. Stragglers are still reported until early September.
When is the best time to see a Purple Martin in South Carolina?
The Purple Martin is reported most often in late June, on about 11% of South Carolina checklists.
Where in South Carolina are Purple Martins seen most often?
By county, Williamsburg County, Clarendon County, and Marlboro County have the highest peak reporting rates for the Purple Martin (counties with at least 200 checklists).