| Vathirairuppu | |
| Other Name: | Vathirayiruppu |
| Settlement Type: | Town panchayat |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 9.6353°N 77.6389°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Virudhunagar |
| Established Title: | Established |
| Governing Body: | Taluk |
| Unit Pref: | Metric |
| Elevation M: | 73 |
| Population Total: | 15999 |
| Population As Of: | 01-Jan-2001 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 626 132 |
| Area Code Type: | Telephone code |
| Area Code: | 04563 |
| Registration Plate: | TN-67, TN-84 |
| Blank1 Name Sec1: | Nearest city |
| Blank1 Info Sec1: | Madurai |
| Blank2 Name Sec1: | Lok Sabha constituency |
| Blank2 Info Sec1: | Tenkasi |
| Blank3 Name Sec1: | Vidhan Sabha constituency |
| Blank3 Info Sec1: | Srivilliputtur |
| Blank4 Name Sec1: | Civic agency |
| Blank4 Info Sec1: | Town Panchayat |
| Blank1 Name Sec2: | Climate |
| Blank1 Info Sec2: | Apr-May - Min 20 Deg C Max 42 Deg C and May - Mar - Min 20 Deg C Max 30 deg C (Köppen) |
Watrap is a taluk in Virudhunagar District, in the Indian state of Tamil Nadu.
Watrap's traditional name before the British came was Vatratha Iruppu, which translates as "surplus water".
A Perumal temple (Pěrumāḷ Kōyil, பெருமாள் கோயில்) sits in the centre of the village and a Shiva and Hanuman temple is at the outskirts of the village.
The holy uphill shrine "Sundara Mahalingam (Lord Shiva) temple" (also known as Thaani Paarai and Sathuragiri Malai) is there. Aadi amavasai (New Moon Day in the month of Aadi) is when devotees throng here.
A Krishna, Rukmini and Sathyabama temple called Gopala Swamy Malai tops a small hill, 22 km from Watrap. A Shiva Cave temple called Motta Malai is 16 km from Watrap.
Agriculture is the primary livelihood. The main work is cultivatioagriculture, led by paddy, coconut and cotton.
Branches of State Bank of India, Union Bank of India, Virudhunagar District Cooperative Bank and Rural Cooperative Bank are there.
Three government-aided schools and two private schools operate there.
The town sits on the bank of the Arjuna River. Dams Pilavakal (பிளவக்கல் அணை) and Kovilaaru provide irrigation.
Sathuragiri Hills contains dense tropical greenery, undisturbed forests and wildlife. Natural caves, some 2 km away from Sathuragiri temple and a fresh water pond at the top of the hill attract visitors. Perrumal Mottai is the highest and coldest spot in these hills.
Natural spring Maavuthu (big spring) us 8 km from Watrap. It is situated at the foot of the western Ghats.